MovinCool CM25 Service Manual - Manual (Page 54)

Repair Section
54
LCD
displays
self-
diagnostic
codes.
E12 E14 4 Excessive current from
the STI module to the
compressor.
RESET the controller *1 twice or three times. If
the error still occurs, replace the compressor.
E15 4 Compressor lock. RESET the controller *1 twice or three times. If
the error still occurs, replace the compressor.
E16 4 Compressor wires are
disconnected.
• Reconnect and check the compressor
wires.
• Reconnect and check the relay board
wires.
RESET the controller *1 .
E17 4 Excessive compressor
load.
RESET the controller *1 twice or three times. If
the error still occurs, replace the compressor.
Excessive compressor
startup differential
pressure.
E13 E18 4 Excessive current from
the power source to the
STI module.
RESET the controller *1 twice or three times. If
the error still occurs, replace the compressor.
E19 4 Degraded heat sink
performance.
Replace the relay board.
Then initialize the fan motor. (See page 61.)
E20 4 Recovery from
momentary power loss or
momentary voltage drop.
Check if the supplied voltage to the unit is
unstable due to the external influence or not.
RESET the controller *1 .
If the error still occurs, replace the relay
board.
Then initialize the fan motor. (See page 61.)
Momentary power loss,
or momentary voltage
drop.
E21 4 Sensor on the relay board
is short or open.
Replace the relay board.
Then initialize the fan motor. (See page 61.)
E22 4 Compressor actuating
circuit on the relay board
is short or open.
Replace the relay board.
Then initialize the fan motor. (See page 61.)
Condition Check Area
Possible Cause Remedy
Unit does
not
operate.
Self-Diagnostic
Codes
(WMC)
Buzzer
Pattern
User
Mode
Service
Mode
*1 : To RESET the controller, press RESET button, then press ON/OFF button.