MovinCool Classic 40 Service Manual - Manual (Page 47)

Repair Section
47
(2) Unit does not start (operate)
Condition
Possible Cause
Remedy
Checking Area Cause
Does not
operate at
all
Control
Panel
display turns
off.
1. Voltage. Power failure. Repair power supply.
2. Phase sequence of the
power source.
Phase sequence is
reversed.
Change any 2 of the 3 wires
for power source wires.
3. Ground fault breaker trip. Ground fault or defective
ground fault.
Repair ground fault section.
Reset or repair breaker.
4. Fuse. Fuse blown. Repair shorting section.
Replace fuse on the relay
board.
5. Transformer. Defective transformer. Replace transformer.
6. Reverse phase protector. Open circuit or insufficient
contact.
Replace reverse phase
protector.
Control
panel
display
turns on
Control
Panel
display
shows error
codes.
1. Display code “E1”. Improper room thermistor
connection.
Check connection.
Defective room thermistor
(short or open).
Replace room thermistor.
2. Display code “E2”. Improper freeze protection
thermistor connection.
Check connection.
Defective freeze protection
thermistor (short or open).
Replace freeze protection
thermistor.
3. Display code “E4”. Defective fan motor Replace fan motor
Defective overcurrent relay Replace overcurrent relay
See “Stops after running a while” of Troubleshooting on
page 48.
4. Display code “CF”. Defective compressor Replace compressor
See “Stops after running a while” of Troubleshooting on
page 48.
5. Display code “HP”. Improper high pressure
switch connection.
Check connection.
Defective high pressure
switch (short or open).
Replace high pressure
switch.
See “Stops after running a while” of Troubleshooting on
page 48.
6. Display code “AL”. Input fire alarm signal from
fire alarm system
Check fire alarm system