13 Evaporator Fan High Speed Current Too Low

Thermo King Alarm Code

Description	Corrective Action
Evaporator Fan high Speed Current Too Low (Check Alarm) Occurs during Pretrip (PTI), Function test or Probe test. (Evaporator fan power consumption is 25% below expected current draw (below 1.5 to 2.3 amps, depending on voltage). If CRR Model) (Evaporator fan power consumption is 25% below expected current draw (below 1.6 to 2.4 amps, depending on voltage). If CSR Model) Indicates: Defective evaporator fan motor relay Defective or open fan motor internal over temperature protection switch Defective volt or amp meter on relay board Incorrect motor or motor connections	Open evaporator door and make sure all fans rotate freely. Enter manual Function Test and start evaporator fans on HIGH speed. Make sure all fans start on high speed. If a motor does not start and is very hot, wait 10 minutes for internal over temperature switch to close. Check fan motor volts and amps Check volt and ampere meter.

Description

Corrective Action

Evaporator Fan high Speed Current Too Low (Check Alarm)

Occurs during Pretrip (PTI), Function test or Probe test.
(Evaporator fan power consumption is 25% below expected current draw (below 1.5 to 2.3 amps, depending on voltage). If CRR Model)
(Evaporator fan power consumption is 25% below expected current draw (below 1.6 to 2.4 amps, depending on voltage). If CSR Model)
Indicates:
Defective evaporator fan motor relay
Defective or open fan motor internal over temperature protection switch
Defective volt or amp meter on relay board
Incorrect motor or motor connections

Open evaporator door and make sure all fans rotate freely.
Enter manual Function Test and start evaporator fans on HIGH speed. Make sure all fans start on high speed. If a motor does not start and is very hot, wait 10 minutes for internal over temperature switch to close.
Check fan motor volts and amps
Check volt and ampere meter.

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