sb200 thermoking code 36 and 84

[zanman]

i am having issues with 2 units failing after a hour or 2 of run time on electric. pretrip and runs fine on diesel... pretrips and passes on electric-- but as soon as we leave the system fails and codes 36 and 84 pop. we can clear the codes and it will restart. very perplexing to say the least-- the power is good- amps are good. sometimes runs 1-2 hours without a failure somestime up to 6-8. any ideas or anyone ran into this before?

[install monkey]

http://www.tkxrefrigeration.com/thermo-king-alarm-codes/
:)

[zanman]

i know the codes - but there zero symptoms of anything being wrong--- never have i seen this before... i am wondering if someone has run into a phantom like this problem before?

[cadwaladr]

oil pressure switch

[zanman]

oil pressure switch

nope- tried that lol... still digging-- i think it might be the relay board?

[clivemtk]

code 36 loose belts- altenator charge dropping off ac frequency low code 84micro is trying to rectify a fault that is 9.10.17.18.19.20.23.24.35.40.41.42.44.63 i would guess at altenator brushes

[zanman]

code 36 loose belts- altenator charge dropping off ac frequency low code 84micro is trying to rectify a fault that is 9.10.17.18.19.20.23.24.35.40.41.42.44.63 i would guess at altenator brushes

ok - will check the brushes

[gravy258]

the slip rings and the brushes on Prestolite alternators wear out at the same time (90% of the time)
so you might be looking at a new Alternator. Those loose belt codes are a real pain in the butt.
what software revision is your SB200 on ?

36 Electric Motor Failed
to Run/Loose Belts
This is a Shutdown
Alarm
This alarm code may
be associated with
Alarm Code 84
Restart Null. See
Alarm Code 84 for
details
2P
CHP
8F
W
Operation
This alarm will occur if the electric motor does not start and run when
required. This alarm will occur if the charging current falls below
predetermined limits for a period of time.
or
if the ac signal frequency from the alternator to the microprocessor
“W” analog input falls below a predetermined limit.
Diagnostics
1. Check contactor and standby power supply.
2. Check alternator operation.
3. Check drive belts for condition and tension.
4. Check [AMPS] display if the unit uses the current shunt. If the
alternator is operational and charging current is still low check
the shunt circuits for proper operation as shown under Alarm
Code 62.


84 Restart Null
This can be a Check
or Shutdown Alarm
This alarm clears
automatically if the
original condition
does not re-occur
None Operation
This alarm indicates that the microprocessor is attempting to take
corrective action due to the occurrence of Shutdown Alarm Codes 9,
10, 17, 18, 19, 20, 23, 24, 35, 40, 41, 42, 44 or 63. The
microprocessor will take corrective actions as a result of one or more
of these codes and then attempt a restart in order to keep the unit
running. Many of these actions include a “waiting period” (to allow
the engine to cool down, a high pressure condition to subside or the
like). The Alarm Code that caused the condition and Alarm Code 84
may be present to indicate that the microprocessor is taking a
corrective action and that a restart will be attempted when conditions
permit.
If the corrective action is successful the original alarm code as well
as Alarm Code 84 are cleared automatically. If the original alarm
condition continues to occur and the corrective actions taken by the
microprocessor are not successful the original alarm code remains,
Alarm Code 84 is automatically cleared and the unit will shut down.
Conditions that are automatically cleared are logged on units
equipped with Data Loggers.
Diagnostics
1. Alarm Code 84 indicates that the microprocessor is actively taking
corrective action even though the unit may appear to be shut
down. If Alarm Code 84 is present the microprocessor should be
allowed time to complete its corrective actions. The display will
not flash when Alarm Code 84 is present.
2. Record the alarm code or codes that are present along with the
Alarm Code 84.
If Alarm Code 84 disappears and the other alarm code or codes are
still present, proceed with corrective actions for those alarm codes.

[Kuhltek]

Keep it simple and just GET A DOWNLOAD and all will be revealed........it's like magic

[gravy258]

its not actually that simple.

[zanman]

Keep it simple and just GET A DOWNLOAD and all will be revealed........it's like magic
not that simple because we have all the software-- the download shows nothing out of the ordinary just shut down times- which are not consistant and the same alarms

[Kuhltek]

I know its not THAT simple but if the unit has DAS can't you turn on all the info to record to download via #attached device block 1 ? Does that give a frequency? So at least the problem can be diagnosed through process of elimination?I might be wrong but generally a bad W circuit should give a 48 code on diesel operation
This seems like an odd problem but what is sticking out to me is the fact you have 2 units doing the same thing......are these units running on electric at the same location???

[zanman]

I know its not THAT simple but if the unit has DAS can't you turn on all the info to record to download via #attached device block 1 ? Does that give a frequency? So at least the problem can be diagnosed through process of elimination?I might be wrong but generally a bad W circuit should give a 48 code on diesel operation
This seems like an odd problem but what is sticking out to me is the fact you have 2 units doing the same thing......are these units running on electric at the same location???

actually 6 units running at same location--2 are doing the same thing-- wondering if the phase selector is failing???-- we are only getting 217 volts-60htz,

[clivemtk]

are these units 3phase

[zanman]

are these units 3phase

yes they are SB200

[waterskidog]

Can you send us a download?

[cadwaladr]

what should the input voltage be across phase,s

[clivemtk]

if they are american which looks like the elec motor is 24hp american power being 440volts 3phase 60hz earlier he said hes getting 217volts so has it phase detection