Thermo King CSR Series User Manual

MP-3000 Controller
122
42 Supply Air Temperature Too Low
(Check Alarm)
• During Chill or Frozen Mode: Supply air
temperature is too low compared to return air
temperature under operating conditions.
• Indicates:
• Ice or frost on evaporator coil
• Low heating capacity
• Incorrect evaporator fan operation
• Incorrect connection or location of supply or
return air sensors
• Check for sensor or evaporator fan alarm
codes.
• Open evaporator door. Inspect coil for ice or
frost and initiate manual defrost if necessary.
Check for correct evaporator fan motor
rotation and operation.
• Check supply and return sensor connections
and locations.
43 Return Air Temperature Too High
(Check Alarm)
• During Defrost: Return air temperature increases
above 40 C (104 F).
• Indicates:
• Defective return or evaporator coil sensor
• Return and evaporator coil sensor connections
are reversed
• Check for sensor alarm codes.
• Check supply and return sensor connections
and locations.
45 Evaporator Coil Temperature Too High
(Check Alarm)
• During Chill or Frozen Mode: Evaporator coil
temperature is too high compared to return air
temperature under operating conditions.
• Indicates:
• Low refrigerant charge.
• Defective evaporator coil or return air sensor
• Incorrect connection or location of evaporator coil
or return air sensor
• Check for sensor alarm codes.
• Check discharge and suction pressure gauge
readings and check refrigerant charge.
• Check evaporator coil and return air sensor
connections and locations.
46 Evaporator Coil Temperature Too Low
(Check Alarm)
• During Chill or Frozen Mode: Evaporator coil
temperature is too low compared to return air
temperature under actual operating conditions.
• Controller initiates defrost if no recent defrost.
• Indicates:
• Airflow is blocked in the container
• Evaporator fans do not operate
• Fresh air exchange vent open too much on
frozen load
• Defective evaporator coil or return air sensor
• Check for sensor or evaporator fan alarm
codes.
• Open evaporator door. Inspect coil for ice or
frost and initiate manual defrost if necessary.
Check for correct evaporator fan rotation and
operation.
• Inspect return air grille and cargo load.
Remove any debris or cargo from blocking
return air grille.
• At setpoints below 5 C (41 F), maximum air
vent setting is not allowed.
• Check evaporator coil and return air sensor
connections and locations.
Alarm Codes, Descriptions and Corrective Actions (Continued)
Code Description Corrective Action

Thermo King CSR Series Specifications

General

Brand	Thermo King
Model	CSR Series
Category	Refrigerator
Language	English