Thermo King CSR Series - Page 108

MP-3000 Controller
108
8
Running with High Supply Difference
Indicates:
• Temperature difference between the left hand
and right hand Supply sensors is too large;
even after Probe Test indicates no sensor
errors.
• Possible causes include air leak around
sensor cable, low refrigerant charge, defective
expansion valve, etc.
• Controller clears message during defrost and
when U
NIT ON/OFF switch is turned OFF.
9
High Pressure Cutout, Check Condenser Fan
Indicates:
• Unit stops due to high pressure cutout, water
pressure switch is closed and condenser
temperature is high.
• Controller clears message on compressor
start-up.
• No alarm is set until Controller determines that
unit current draw is too low (Alarm 37) or supply
air temperature is too high (Alarm 41).
10
Condenser Probe Found, Please Change
Type
Indicates:
• Controller is set for CRR40 DF and start-up is
initiated on a KVQ/CRR40, CSR40 or CSR40
Magnum unit. Correct by turning U
NIT ON/OFF
switch O
FF. Then set CONTROLLER SOFTWARE
switch to correct position. See “Controller
Software Selection” on page 103.
• None. On CRR40 DF units, condenser sensor
input must be left open.
11
Scroll Compressor, High Temperature
Indicates:
• Compressor stops because discharge
temperature is above 140 C (284 F). Message
remains in display until discharge temperature
decreases to normal.
• Controller clears message after compressor
start-up.
12
Scroll Compressor, Low Pressure
Indicates:
• Low pressure cutout switch is open.
• Possible causes include stepper motor valve
will not open, warm gas bypass valve will not
open, low refrigerant charge, defective low
pressure cutout switch, open circuit, etc.
• Controller activates Alarm 31 after 5 minutes.
• Controller clears message after compressor
start-up.
14
Evaporator High Temperature Switch Open
Indicates:
• Controller disables electric heaters due to
open high temperature switch circuit.
• Possible causes include evaporator
temperature over 54 C (130 F), defective
heater, defective evaporator overheat switch,
open circuit, etc.
• Controller clears message on compressor
start-up.
• No alarm is set until Controller determines that
heater current draw is too high (Alarm 10), unit
unit current draw is too high (Alarm 36), or
defrost time is too long (Alarm 20).
Error Messages and Controller Actions (Continued)
Message
No.
Error Message Controller Action