Thermo King CSR Series User Manual

MP-3000 Controller
123
52 Probe Error
(Check Alarm)
• Occurs during pre-trip (PTI) test or probe test failed
in Chilled mode.
• Temperature difference between return air and
evaporator coil sensors is too high (1.5 C [2.7 F]
difference maximum)
• Temperature difference between return air and
supply air sensors is too high (0.8 C [1.5 F]
difference maximum)
• Temperature difference between LH supply and RH
supply sensors is too high (0.5 C [1.0 F] difference
maximum)
• Indicates:
• Incorrect temperature reading on one sensor
• Supply air sensor not placed in airflow stream
• Check sensor connections. Check sensor
resistance of each sensor. Resistance must
be 2,000 ohms at 25 C (77 F).
• Check left hand and right hand supply air
sensor locations.
NOTE: Code 52 has been replaced by codes
115, 116, 117 in the current revision of the
controller software. If code 52 appears on
the controller screen, the controller
software is not current and need updating.
53 High Pressure Cutout Switch Off Error
(Check Alarm)
• Occurs during pre-trip (PTI) test only.
• Compressor does not stop during high pressure
cutout switch test.
• Indicates:
• Faulty compressor contactor or control circuit
• Low refrigerant charge
• Defective high pressure cutout switch
• Strong winds causing cooling of condenser coil in
low ambient conditions
• Check discharge and suction pressure gauge
readings and check refrigerant charge.
• Enter Manual Function Test menu. Start the
following components together: compressor
100%, compressor and evaporator fans (high).
Discharge pressure should increase and
compressor should stop at 2250 kPa, 22.5
bar, 326 psig (high pressure cutout switch
opens).
54 High Pressure Cutout Switch On Error
(Check Alarm)
• Occurs during pre-trip (PTI) test only.
• Compressor does not start within normal time
during high pressure cutout switch test.
• Indicates:
• High pressure cutout switch did not respond to
pressure change within 5 seconds
• Air in refrigeration system
• Defective high pressure cutout switch
• Check discharge and suction pressure gauge
readings.
• Enter Manual Function Test menu. Start the
following components together: compressor
100%, compressor and evaporator fans (high).
Discharge pressure should increase and
compressor should stop at 2250 kPa, 22.5
bar, 326 psig (high pressure cutout switch
opens). Then start condenser fan. Discharge
pressure must drop quickly (10 to 20 seconds)
to 1550 kPa, 15.5 bar, 225 psig and
compressor should start (switch closes)
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