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Shamel
11-05-2008, 08:19 PM
Hey there guys. I need some help! i'm working on a Carrier Transicold freezer container running on R134a. I keep getting an error code (AL21) on the electronic controller & the unit refuses to start up.The alarm LED is continuosly lit. Earlier this week it had an "AL52" fault & we traced that back to a fault evap. fan. I suspect AL21 to be one of the sensors but thats just a guess. Anyone with solid knowledge on these error codes could please help. I would appreciate it, if i could get the full list of codes for this machine. Thanx.

absolute-zero
11-05-2008, 09:46 PM
Hey there guys. I need some help! i'm working on a Carrier Transicold freezer container running on R134a. I keep getting an error code (AL21) on the electronic controller & the unit refuses to start up.The alarm LED is continuosly lit. Earlier this week it had an "AL52" fault & we traced that back to a fault evap. fan. I suspect AL21 to be one of the sensors but thats just a guess. Anyone with solid knowledge on these error codes could please help. I would appreciate it, if i could get the full list of codes for this machine. Thanx.


What model is the unit? I would assume its a 69NT20/40-????-???

TDI
12-05-2008, 09:56 AM
maybe thats zhe thing you are looking for


CodeNo. TITLE DESCRIPTION

AL13 Expansion Module

Alarm 13 is triggered if the control module has lost communication with the expansion
module for more than five minutes or communication fails within the
first 15 seconds on power up. This alarm triggers failure action C (evaporator fan
only) or D (all machinery off) of Function Code Cd29 if the unit has a perishable
set point. Failure action D (all machinery off) is triggered if the unit has a frozen
set point

AL14 Phase Sequence Failure -- Electronic

Alarm 14 is triggered if the electronic phase detection system is unable to determine
the correct phase relationship. DIRCHECK will be displayed while the
relationship is determined. If the system is unable to determine the proper relationship
alarm 14 will remain active. Additiotnal information on phase detection
may be displayed at Function Code Cd41. If the right most digit of Code Cd41 is
3 or 4, this indicates incorrect motor or sensor wiring. If the right most digit is 5,
this indicates a failed current sensor assembly.

AL15 Loss Cooling Future Expansion

AL16 Compressor Current High

Alarm 16 is triggered if compressor current draw is 15% over calculated maximum
for 10 minutes out of the last hour. The alarm is display only and will trigger
off when the compressor operates for one hour without over current.

AL17 Phase Sequence Failure -- Pressure

Alarm 17 is triggered if a compressor start in both directions fails to generate
sufficient pressure differential. The controller will attempt restart every twenty
minutes and deactivate the alarm if successful. This alarm triggers failure action
C (evaporator fan only) or D (all machinery off) of Function Code Cd29 if the
unit has a perishable set point. Failure action D (all machinery off) is triggered if
the unit has a frozen set point

AL18 Discharge Pressure High

Alarm 18 is triggered if discharge pressure is 10% over calculated maximum for
10 minutes within the last hour. The alarm is display only and will trigger off
when the compressor operates for one hour without overpressure.

AL19 Discharge Temperature High

Alarm 19 is triggered if discharge temperature exceeds 135_C (275_F) for 10
minutes within the last hour. The alarm is display only and will trigger off when
the compressor operates for one hour without over temperature

AL20 Control Circuit Fuse Open (24 vac)

Alarm 20 is triggered by control power fuse (F3) opening and will cause the software
shutdown of all control units. This alarm will remain active until the fuse is
replaced.

AL21 Micro Circuit Fuse Open (18 vac)

Alarm 21 is triggered by one of the fuses (F1/F2) being opened on 18 volts AC
power supply to the Controller. The suction modulation valve (SMV) will be
opened and current limiting is halted. Temperature control will be maintained by
cycling the compressor.

AL22 Evaporator Fan Motor Safety

Alarm 22 responds to the evaporator motor internal protectors. The alarm is triggered
by opening of either internal protector. It will disable all control units until
the motor protector resets and the unit is power cycled.

AL23 Loss of Phase B

Alarm 23 is triggered if low current draw is detected on phase B and IPCP, HPS
or IPEM is not tripped. If the compressor should be running, the controller will
initiate a start up every five minutes and trigger off if current reappears. If the
evaporator fan motors only should be running, the alarm will trigger off is current
reappears. This alarm triggers failure action C (evaporator fan only) or D
(all machinery off) of Function Code Cd29 if the unit has a perishable set point.
Failure action D (all machinery off) is triggered if the unit has a frozen set point

AL24 Compressor Motor Safety

Alarm 24 is triggered when compressor is not drawing any current. It also triggers
failure action ”C” or ”D” set by function Code 29 for perishable setpoint, or
”D” for frozen setpoint. This alarm will remain active until compressor draws
current.
Table 3-6 Controller Alarm Indications (Sheet 2 of 4)

AL25 Condenser Fan Motor Safety

Alarm 25 is triggered by the opening of the condenser motor internal protector
and will disable all control units except for the evaporator fans. This alarm will
remain active until the motor protector resets. This alarm triggers failure action
C (evaporator fan only) or D (all machinery off) of Function Code Cd29 if the
unit has a perishable set point. Failure action D (all machinery off) is triggered if
the unit has a frozen set point

AL26 All Supply and Returntemperature Control Sensors Failure

Alarm 26 is triggered if the Controller determines that all of the control sensors
are out-of-range. This can occur for box temperatures outside the range of --50_C
to +70_C (--58_F to +158_F). This alarm triggers the failure action code set by
Function Code Cd29.

AL27 A/D Accuracy Failure

The Controller has a built-in Analog to Digital (A-D) converter, used to convert
analog readings (i.e. temperature sensors, current sensors, etc.) to digital readings.
The Controller continuously performs calibration tests on the A-D converter.
If the A-D converter fails to calibrate for 30 consecutive seconds, this
alarm is activated.This alarm will be inactivated as soon as the A-D converter
calibrates.

AL28 Low Suction Pressure

Alarm 28 is triggered if suction pressure is below 2 psia and alarm 66 (Suction
Pressure Transducer Failure) is not active. This alarm will be inactivated when
suction pressure rises above 2 psia for three continuous minutes. This alarm triggers
failure action C (evaporator fan only) or D (all machinery off) as determined
by User Selectable Failure Response if the unit has a perishable set point; Failure
action D (all machinery off) if the unit has a frozen set point. Reset SMV.

AL51 Alarm List Failure
During start-up diagnostics, the EEPROM is examined to determine validity of
its contents. This is done by testing the set point and the alarm list. If the contents
are invalid, Alarm 51 is activated. During control processing, any operation
involving alarm list activity that results in an error will cause Alarm 51 to be activated.
Alarm 51 is a “display only” alarm and is not written into the alarm list.
Pressing the ENTER key when “CLEAr” is displayed will result in an attempt to
clear the alarm list. If that action is successful (all alarms are inactive), Alarm 51
will be reset.

AL52 Alarm List Full

Alarm 52 is activated whenever the alarm list is determined to be full; at start-up
or after recording an alarm in the list. Alarm 52 is displayed, but is not recorded
in the alarm list. This alarm can be reset by clearing the alarm list. This can be
done only if all alarms written in the list are inactive.

AL53 Battery Pack Failure

Alarm 53 is caused by the battery pack charge being too low to provide sufficient
power for battery-backed recording. Renew replaceable batteries. If this alarm
occurs on start up, allow a unit fitted with rechargeable batteries to operate for up
to 24 hours to charge rechargeable batteries sufficiently to deactivate the alarm

AL54 Primary Supply Temperature Sensor Failure (STS)

Alarm 54 is activated by an invalid primary supply temperature sensor reading
that is sensed outside the range of --50 to +70_C (--58_F to +158_F) or if the
probe check logic has determined there is a fault with this sensor. If Alarm 54 is
activated and the primary supply is the control sensor, the secondary supply sensor
will be used for control if the unit is so equipped. If the unit does not have a
secondary supply temperature sensor, and AL54 is activated, the primary return
sensor reading, minus 2_C will be used for control.
NOTE
The P5 Pre-Trip test must be run to inactivate the alarm

AL55 DataCORDER Failure

This alarm activates to indicate the DataCORDER has a software failure. To
clear this alarm, reconfigure the unit to the current model number. This failure
may be the result of a voltage dip in access of 25%.

AL56 Primary Return Temperature Sensor Failure (RTS)

Alarm 56 is activated by an invalid primary return temperature sensor reading
that is outside the range of --50 to +70_C (--58_F to +158_F). If Alarm 56 is activated
and the primary return is the control sensor, the secondary return sensor
will be used for control if the unit is so equipped. If the unit is not equipped with
a secondary return temperature sensor or it fails, the primary supply sensor will
be used for control.
NOTE
The P5 Pre-Trip test must be run to inactivate the alarm.

AL57 Ambient Temperature Sensor Failure

Alarm 57 is triggered by an ambient temperature reading outside the valid range
from --50_C (--58_F) to +70_C (+158_F).

AL58 Compressor High Pressure Safety

Alarm 58 is triggered when the compressor high discharge pressure safety switch
remains open for at least one minute. This alarm will remain active until the pressure
switch resets, at which time the compressor will restart.

AL59 Heat Termination Thermostat

Alarm 59 is triggered by the opening of the heat termination thermostat and will
result in the disabling of the heater. This alarm will remain active until the thermostat
resets.

AL60 Defrost Temperature Sensor Failure

Alarm 60 is an indication of a probable failure of the defrost temperature sensor
(DTS). It is triggered by the opening of the heat termination thermostat (HTT) or
the failure of the DTS to go above set point within two hours of defrost initiation.
After one-half hour with a frozen range set point, or one-half hour of continuous
compressor run time, if the return air falls below 7_C (45_F), the Controller
checks to ensure the DTS reading has dropped to 10_C or below. If not, a DTS
failure alarm is given and the defrost mode is operated using the return temperature
sensor. The defrost mode will be terminated after one hour by the Controller.

AL61 Heaters Failure

Alarm 61 is triggered by detection of improper amperage resulting from heater
activation or deactivation. Each phase of the power source is checked for proper
amperage.This alarm is a display alarm with no resulting failure action, and will
be reset by a proper amp draw of the heater.
AL62 Compressor Circuit Failure

Alarm 62 is triggered by improper current draw increase (or decrease) resulting
from compressor turn on (or off). The compressor is expected to draw a minimum
of 2 amps; failure to do so will activate the alarm. This is a display alarm
with no associated failure action and will be reset by a proper amp draw of the
compressor.

AL63 Current Over Limit

Alarm 63 is triggered by the current limiting system. If the compressor is ON
and current limiting procedures cannot maintain a current level below the user
selected limit, the current limit alarm is activated. This alarm is a display alarm
and is inactivated by power cycling the unit, changing the current limit via the
code select Cd32, or if the current decreases below the activation level.

AL64 Discharge Temperature Over Limit

Alarm 64 is triggered if the discharge temperature sensed is outside the range of
--60_C (--76_F) to 175_C (347_F), or if the sensor is out of range. This is a display
alarm and has no associated failure action.

AL65 Discharge Pressure Transducer Failure

Alarm 65 is triggered if a compressor discharge transducer is out of range. This is
a display alarm and has no associated failure action.

AL66 Suction Pressure Transducer Failure

Alarm 66 is triggered if a suction pressure transducer is out of range. This is a
display alarm and has no associated failure action.

AL67 Humidity Sensor Failure

Alarm 67 is triggered by a humidity sensor reading outside the valid range of 0%
to 100% relative humidity. If alarm AL67 is triggered when the dehumidification
mode is activated, then the dehumidification mode will be deactivated.

AL69 Suction Temperature Sensor Failure

Alarm 69 is triggered by a suction temperature sensor reading outside the valid
range of --60_C (--76_F) to 150_C (302_F). This is a display alarm and has no
associated failure action.

NOTE
If the Controller is configured for four probes without a DataCORDER, the DataCORDER alarms AL70
and AL71 will be processed as Controller alarms AL70 and AL71. Refer to Table 3-10.
The Controller performs self-check routines. if an internal failure occurs, an
“ERR” alarm will appear on the display. This is an indication the Controller
needs to be replaced.

ERROR DESCRIPTION

ERR 0 -- RAM failure Indicates that the Controller working memory has failed.
ERR Internal Microprocessor

EER 1 -- Program Memory failure Indicates a problem with the Controller program.
# Failure EER 2 -- Watchdog time--out

The Controller program has entered a mode whereby
the Controller program has stopped executing.

EER 3 -- On board timer failure

The on board timers are no longer operational.
Timed items such as; defrost, etc. may not work.

EER 4 -- Internal counter failure

Internal multi-purpose counters have failed. These
counters are used for timers and other items.

EER 5 -- A-D failure The Controller’s Analog to Digital (A-D) converter has failed.

Entr StPt Enter Setpoint (Press Arrow & Enter) The Controller is prompting the operator to enter a set point.

LO Low Main Voltage (Function Codes Cd27--38 disabled and NO alarm stored.)
This message will be alternately displayed with the set point whenever the supply
voltage is less than 75% of its proper value.

Shamel
12-05-2008, 10:03 PM
Hey there. Thanks for the response. the first few digits of the model are "NT42". Itake it thats what you require.

absolute-zero
12-05-2008, 10:34 PM
Hey there. Thanks for the response. the first few digits of the model are "NT42". Itake it thats what you require.

No that model does not ring any bells here. It would look something like this: 69NT20-284 / 69NT40-461Either way here is a link to a place, so you can download the manual you need. http://www.container.carrier.com/details/0,2806,CLI1_DIV9_ETI742,00.html Hope this helps.

paulo almeida
15-05-2008, 01:58 AM
No that model does not ring any bells here. It would look something like this: 69NT20-284 / 69NT40-461Either way here is a link to a place, so you can download the manual you need. http://www.container.carrier.com/details/0,2806,CLI1_DIV9_ETI742,00.html Hope this helps.

HI ABSOLUTE. DO YOU HAVE ADRESS FOR MANUAL OF TRANSPORT REFRIGERATION?

absolute-zero
15-05-2008, 02:45 AM
HI ABSOLUTE. DO YOU HAVE ADRESS FOR MANUAL OF TRANSPORT REFRIGERATION?

What manuals are you looking for in regards to transport refrigeration units? The link or address I just posted is about as good as it gets. A-Z

deu58
16-05-2008, 01:38 AM
all carrier manuals parts and operating are available on line, Use the link in post 5 to get to carriers manuals index on the carrier webite

Good luck

deu58

absolute-zero
16-05-2008, 03:42 PM
all carrier manuals parts and operating are available on line, Use the link in post 5 to get to carriers manuals index on the carrier webite

Good luck

deu58

Oh I forgot this one to add as well. http://www.transportaircon.carrier.com/details/0,2806,CLI1_DIV8_ETI10093,00.html This is CTC climate control manuals for transit bus. You will find repair manuals, parts manuals, install manuals, and tool manuals.Have fun
Dont forget to throw some reputation this way.

paulo almeida
17-05-2008, 01:14 AM
Oh I forgot this one to add as well. http://www.transportaircon.carrier.com/details/0,2806,CLI1_DIV8_ETI10093,00.html This is CTC climate control manuals for transit bus. You will find repair manuals, parts manuals, install manuals, and tool manuals.Have fun
Dont forget to throw some reputation this way.

thanks for your attencion, but i need for transpor refrigeration, for trucs

absolute-zero
19-05-2008, 01:15 AM
thanks for your attencion, but i need for transpor refrigeration, for trucs

Thats not available at CTC extranet, only marine and bus. sorry dude.

Will
19-05-2008, 03:40 AM
for trucsI've got a few older ones stashed on a CD somewhere.
Got a model number ?

phil Landon
19-05-2008, 11:00 PM
hi there. I have had this problem before as well. the first thing to check is the fuses on the front of the controller. (F1 ,F2) the alarm code tells you that one of these fuses has blown. relace fuse and start up the box. If the box is turned back on and tha alarm light is still active then go into the alarm list and make sure the alarm hasn't gone from AA status to IA21. Once it has gone IA the alarm can be cleared. If it blows again. check the control transformer voltage to the controller..... hope this helps

bruisermac
08-07-2008, 04:26 AM
its the SMV module shorting to ground underneath the quench valve. from the factory they install the module so the water that drips off the quench valve right into the wiring. hope this helps.

SGTChee
22-07-2009, 01:39 PM
Hello all, im currently out in the middle of no where in afganistan and I came across a Carrier transicold container with a alarm code AL15, so i read thru the manual and it tells me nothing of that code. the model is 60NT40-541-302. if anyone can tell me why this container is shutting off and displaying AL15 that would be great.:)

SGTChee
22-07-2009, 01:41 PM
sorry back again the model number is 69NT40-541-302.....a 9 instead of a 0:confused:

SGTChee
22-07-2009, 06:48 PM
ok I looked at it somemore, for one there is 543Volts coming in, and 9 amps on each leg, the quench valve is frosting over and there is a major temp difference on the filter dryer. the unit is getting power from the generator that hooks up to it on top. when the unit goes into cool mode the temp dose not go lower than 73 degrees F. All pre-trip codes pass except (auto2 mode) under P8-1 this comes up as a fail.:rolleyes:

reefermechanic
22-07-2009, 09:30 PM
ok I looked at it somemore, for one there is 543Volts coming in, and 9 amps on each leg, the quench valve is frosting over and there is a major temp difference on the filter dryer. the unit is getting power from the generator that hooks up to it on top. when the unit goes into cool mode the temp dose not go lower than 73 degrees F. All pre-trip codes pass except (auto2 mode) under P8-1 this comes up as a fail.:rolleyes:
hi sgtchee

have you check refrigeration level??

al15 is loss of cool..reefr units haven t got good performans..

i think refrigaration level is no good..

also txv is not good workşng?*you have to check its..is there to much ice on the suction pipe??If there is too much ice on cuction pipe txv is not good working;)

im waiting ur reply..

see you

reefer mechanic..

Will
23-07-2009, 02:40 AM
and there is a major temp difference on the filter dryer.Ding, ding, ding, ding.

SGTChee
23-07-2009, 08:05 AM
once i get the some gauges to check it out, what would be the low and high scales read? could i just recover the whole refrigerant out with the robinair? the book says 10.8 lbs but the label on the compresser says 8.6 lbs and i missing something?

bruisermac
26-07-2009, 05:48 AM
10 bucks says the condenser is blown...

mmunhoz
03-08-2009, 12:49 PM
Yes it can be a supply or return sensor!

mmunhoz
03-08-2009, 12:58 PM
Be also carefull as the motor IP is electrically connected to the controller and if the motor internal insullation is overheated the IP thermistor can ´touch´ the coils and then the controller blows away with a 440V shortcut.

bjr
05-08-2009, 09:58 AM
hi there your al 52 it alarm list full coz you have some alarms that is active i mean that al 21 is power faiuler look at carrier.com and you can find the alarm list for free hope that well help you

phil Landon
17-08-2009, 12:04 AM
the filter dryer is blocked try changing that first before anything else

carl25
22-02-2010, 03:59 PM
yeah i probally think its one of the sensors just check them

Daltonreefers
15-07-2010, 09:35 AM
HI This al means you are missing supply from the transformes to the controller check all fuses and also we found that some times you have to replace the on/off switch due to bad connections inside switch

tariqkaleem786
29-09-2010, 12:41 PM
Dear Sir/Madam,

Sir I need 700 units used Carrier Transicold Gen Set model 1992 – 2000.

Kindly send me best possible rates for ex-karachi Pakistan. & condition of gen set.

And if possible please send me pictures of gen set.

And also send me payment term & condition detail..


Thanks & Best Ragards
Tariq Kaleem
+92-321-2663355


tk@faiztransport.com

tariqkaleem786
29-09-2010, 12:42 PM
Dear Sir/Madam,

Sir I need 700 units used Carrier Transicold Clip on Gen Set model 1992 – 2000.

Kindly send me best possible rates for ex-karachi Pakistan. & condition of gen set.

And if possible please send me pictures of gen set.

And also send me payment term & condition detail..


Thanks & Best Ragards
Tariq Kaleem
+92-321-2663355


tk@faiztransport.com

tariqkaleem786
29-09-2010, 12:46 PM
Dear Sir,


Sir I need 700 units used Carrier Transicold Clip On Gen Set model 1992 – 2000.

Kindly send me best possible rates for ex-karachi Pakistan. & condition of gen set.

And if possible please send me pictures of gen set.

And also send me payment term & condition detail.


Thanks & Best Regards
+92-321-2663355
tk@faiztransport.com

jit
01-11-2010, 10:37 AM
I would not recommend changing the fuse on the controller and turning on again without first finding out what blew the fuse. You will burn out the controller most likely.
I was involved with reefer when this alarm started occuring on scroll units 69NT40-531-001 and up, assuming this might be the same or similar model you are dealing with.
Check the coil on the economiser solenoid valve (ESV) and you might find it is shorted.
Go to the Carrier website as others have mentioned and under literature, click on manuals and look for the above model.
Also check the techline bulletins for interesting articles if you deal with reefer.

rigsparkie
14-03-2011, 03:38 AM
Hey guys, Please I need your help. I have a transicold unit. It was running fine until it was switched off for some unlooading. upon start up, it refuses to to start and dispays an alarm which is 52; alarm list full. Looking into the alarm, I have about 12 in the list but these are just 4 alarms displayed repeatedly. The alarms are 21,26,54 and 56.
1. I ran p5 in other to deactivate this sensor related alarm but it failed at the end of test. I cannot locate this sensor can someone help?
2. I have checked the fuses related to alarm 21 and they are all in good condition. alarm has gone to IA21 and wont clear. Any advice will be appriciated in this please as I am in a bind now.
I really need to start this system back up PLease any help will be appriciated.

kheilan
24-09-2011, 04:45 AM
maybe thats zhe thing you are looking for


dis so helpful i will make a copy of this thank you so much sir ^^

kheilan
13-11-2011, 12:55 AM
alarm 20,fuse 3 blown,10ampere, 69nt40-501 this is the scenario, i see alarm 20 in my unit so i change the 10ampere fuse 3, but again the fuse is blown again and again.... . . .i don't know what to do i want to have advice in this matter tnx :((

reefermechanic
13-11-2011, 08:27 AM
alarm 20,fuse 3 blown,10ampere, 69nt40-501 this is the scenario, i see alarm 20 in my unit so i change the 10ampere fuse 3, but again the fuse is blown again and again.... . . .i don't know what to do i want to have advice in this matter tnx :((

khelian,,

check you mail box

reefer mechanic..

reefermechanic
13-11-2011, 08:30 AM
Hey guys, Please I need your help. I have a transicold unit. It was running fine until it was switched off for some unlooading. upon start up, it refuses to to start and dispays an alarm which is 52; alarm list full. Looking into the alarm, I have about 12 in the list but these are just 4 alarms displayed repeatedly. The alarms are 21,26,54 and 56.
1. I ran p5 in other to deactivate this sensor related alarm but it failed at the end of test. I cannot locate this sensor can someone help?


2. I have checked the fuses related to alarm 21 and they are all in good condition. alarm has gone to IA21 and wont clear. Any advice will be appriciated in this please as I am in a bind now.
I really need to start this system back up PLease any help will be appriciated.



Hi my friend,

your problem solved??? maybe too late..

see you

reefer mechanic

terminal
13-01-2012, 02:15 PM
alarm 20,fuse 3 blown,10ampere, 69nt40-501 this is the scenario, i see alarm 20 in my unit so i change the 10ampere fuse 3, but again the fuse is blown again and again.... . . .i don't know what to do i want to have advice in this matter tnx :((
hy all technicians
for your probleme i think you have HTT FAILR.you must to changed

carlosluisfs
19-01-2012, 11:21 PM
khelian,,

check you mail box

reefer mechanic..

alarm 20,fuse 3 blown,10ampere, 69nt40-501 this is the scenario, i see alarm 20 in my unit so i change the 10ampere fuse 3, but again the fuse is blown again and again.... i'm having the same exact problem, whAT can i do? can you help me? carlosluisfs@hotmail.com

Ruiripper
21-01-2012, 12:13 AM
Hi all... I have a problem with rts sensor(3 wires)...the controller gives alarm 56, i have change the sensor with an new one, i have done P-5, and it fails 5-2 and keep showing
alarm 56, i've change the controller and it happening the same try with another new sensor nothing change always alarm 56.
I have checked the Continuity of the wires and its OK.

Can it have any conflict with any other sensor of the unit??

Anyone can help me with this stress problem?

I have nightmares with Alarm 56?..please help

Thanks all

Ruiripper
24-01-2012, 12:23 AM
Problem solved:)
the problem was in the controller pins Where the wires of the probe connect...

Thanks all