Sl 100 tk alarm 48

[tspgr]

Hello mates
i have a problem with an sl 100 that gives alarm 48
the unit starts normaly works for about 1.5-2 min and then gives alrm 48 and switch off.

Igive you all the checks that i have done

i have check the wiring of the altenator w that when its going in to the micro is wr and gives 7.4v.
The altenator is charging 13.9-14.2v
the rpm reading at the micro is 1220 lo speed and 1700 high speed .
I have replace the micro and the relai board stil the same alarm
i have alsow replace the rpm sensor to check still the same alarm
i check the fs2 for ground it ok
i check the fs1 line antil the micro its ok i alsow put an external line for the fs1 direct to the micro still the same.....
Please help me i have burn my brain with this one ........

Mixalis

[DaButcher]

Download the ServiceWatch data logger using Wintrac. Review the data using Technician Level to determine the
conditions at the time the alarm was set. Conditions relevant to the alarm are recorded when the alarm is set and
cleared. This data can be very helpful in determining the cause of the alarm.
1. Check clutch and belts for condition, operation and slippage.
2. Check for a stuck compressor.
3. Check alternator operation.
4. Check "W" circuit including resistor for continuity. Monitor with Wintrac or a frequency meter.
5. Check unit configuration if this alarm occurs on a Model 30 (diesel only) unit.
6. Verify the unit model is correctly configured. This alarm is dependant on the alternator drive pulley sizes
used in the unit. The pulley sizes can vary between unit models.
7. Verify that the correct pulley is installed on the alternator. This code can occur if the alternator is replaced
with an alternator with the wrong size pulley installed.
8. Download and inspect the ServiceWatch data logger to determine the operating conditions present when
the alarm code was set. Use the running Service Test Mode Feature to duplicate the operating
conditions. The alternator frequency and engine RPM are logged in ServiceWatch and this information is
viewable in technician mode. This information can be used to confirm the RPM sensor reading and
alternator frequency when the alarm was set.

You can also try upping low speed RPM by 200, not sure of SL specs, but if normal is 1400rpm then try 1600rpm

[tspgr]

Download the ServiceWatch data logger using Wintrac. Review the data using Technician Level to determine the
conditions at the time the alarm was set. Conditions relevant to the alarm are recorded when the alarm is set and
cleared. This data can be very helpful in determining the cause of the alarm.
1. Check clutch and belts for condition, operation and slippage.
2. Check for a stuck compressor.
3. Check alternator operation.
4. Check "W" circuit including resistor for continuity. Monitor with Wintrac or a frequency meter.
5. Check unit configuration if this alarm occurs on a Model 30 (diesel only) unit.
6. Verify the unit model is correctly configured. This alarm is dependant on the alternator drive pulley sizes
used in the unit. The pulley sizes can vary between unit models.
7. Verify that the correct pulley is installed on the alternator. This code can occur if the alternator is replaced
with an alternator with the wrong size pulley installed.
8. Download and inspect the ServiceWatch data logger to determine the operating conditions present when
the alarm code was set. Use the running Service Test Mode Feature to duplicate the operating
conditions. The alternator frequency and engine RPM are logged in ServiceWatch and this information is
viewable in technician mode. This information can be used to confirm the RPM sensor reading and
alternator frequency when the alarm was set.

You can also try upping low speed RPM by 200, not sure of SL specs, but if normal is 1400rpm then try 1600rpm

THANKS FOR THE REPLY ..

1 THE UNIT HAS NO DATA LOGER
2 I HAVE CHECK THE CLUTCH AND BELTS
3 I HAVE ALSOW PUT A BRANT NEW ALTENATOR AT THE UNIT TO CHECK
4 I HAVE MEASURE THE PULEY SIZE IS NORMAL 10CM
5 I ALSOW STARTED THE UNIT HISPEED BY HAND AGAIN THE SAME RESOLT I DONT KNOW WHAT ELSE CAN I CHECK OR DO FOR THE MOMENT ...... ? :confused:

[gravy258]

what software revision is this unit on?
Does it have electric standby?
Have you tried not plugging in the W wire?
Is the unit configured correctly?
The high speed on SL100 is max 1650. 1700 is too high.
They aren't designed to go any faster!
It should say the minimum and maximum on the fridge.
Is it cutting out when it goes into high speed? Or when the alternator is excited?

[tspgr]

what software revision is this unit on?
Does it have electric standby?
Have you tried not plugging in the W wire?
Is the unit configured correctly?
The high speed on SL100 is max 1650. 1700 is too high.
They aren't designed to go any faster!
It should say the minimum and maximum on the fridge.
Is it cutting out when it goes into high speed? Or when the alternator is excited?

good morning to all
I am not at the garage now and I don't remember the exact software .
Yes the unit is a 50 model with standby
Yes I also tried with out the w wire the same result
the unit works for about 1.5-2 min and then the alarm generates
the alternator is exited from the begging..
Tomorrow I will test it on standby too see the results
I let you know...

[clivemtk]

in the guarded acess scren is smx set to yes

[Andy Longhurst]

I come across the W wire picking up interference. Try running a new W wire from the alternator to the pc board. We used the power cable from a Transcan fitting kit the cable is braided.

[The Fox]

i should confirm the following , if the unit is a 50
alt high speed should be 2895/ low speed 2171

if the unit is a 30 high speed should be 2987, low spee should be 2172 ( i am talking alternator pully speed here)

frequency at controller is alt speed divided by 10

[MRW]

Check to see if its set as a high capacity (hc) in guarded access aswell

[whiteshepard]

Check the resistor at the Diesel/Electric Switch (and Switch aswell)

[bellg]

Hello mates
i have a problem with an sl 100 that gives alarm 48
the unit starts normaly works for about 1.5-2 min and then gives alrm 48 and switch off.

Igive you all the checks that i have done

i have check the wiring of the altenator w that when its going in to the micro is wr and gives 7.4v.
The altenator is charging 13.9-14.2v
the rpm reading at the micro is 1220 lo speed and 1700 high speed .
I have replace the micro and the relai board stil the same alarm
i have alsow replace the rpm sensor to check still the same alarm
i check the fs2 for ground it ok
i check the fs1 line antil the micro its ok i alsow put an external line for the fs1 direct to the micro still the same.....
Please help me i have burn my brain with this one ........

Mixalis
What was final outcome with this fridge?