MovinCool Climate Pro 18 Service Manual - Manual (Page 66)

Repair Section
66
Troubleshooting of Unit does not operate - Table 5
Condition Check Area/Diagnostic
Code
Possible Cause Remedy
Unit does
not operate.
LCD
displays
self-
diagnostic
codes.
E4 Loose CTS2 thermistor
connection Reconnect the CTS2
thermistor and check
connection.
Defective CTS2 thermistor
(short or open) Replace the CTS2
thermistor.
E5 Loose CTS3 thermistor
connection Reconnect the CTS3
thermistor and check
connection.
Defective CTS3 thermistor
(short or open) Replace the CTS3
thermistor.
LCD
displays
notification.
OUTSIDE OPERATING
RANGE Unit is operating outside
operating range. Check product specification
for temperature operating
range.
Press any key to exit.
DEFROST Unit is under defrost control. Wait until defrost control is
completed.
KEY LOCKED Buttons on the control panel
are locked. Press and hold MENU/ESC
button for 5 seconds to
unlock.
EXTERNAL THERMOSTAT
ACTIVATED Status is changed to control
by an external thermostat. Operate the unit by an
external thermostat.
LCD shows
normal, but
the unit does
not start. Set point temperature Room temperature
reached the set point
temperature and the unit
operation stopped. Adjust the set point
temperature.
Unit stops
immediately
after
starting.
LCD
displays
normally.
Fan on-off relay on the relay
board Open circuit or insufficient
contact surface area Replace the relay board.
Fan speed change relay on
the relay board Open circuit or insufficient
contact surface area Replace the relay board.
Fan motor insulation
resistance Insulation failure on the fan
motor Replace the fan motor.
Compressor relay on the
relay board Open circuit or insufficient
contact surface area Replace the relay board.
Compressor insulation
resistance Insulation failure on
the compressor Replace the compressor.