MovinCool CM25 Service Manual - Manual (Page 44)

Repair Section
44
6.2 Self-Diagnostic Codes
• Self-diagnostic codes are displayed on the WMC and indicate by LED on the relay board under
the following conditions.
• LED on the relay board indicates self-diagnostic codes for the MWT under the following
conditions.
Self-Diagnostic
Code
Cause
Alarm
Pattern
Relay Board
LED (Red)
Warning
Signal
Output
Detection Contents
User
Mode
Service
Mode
1 2 3 4 5 6
AL AL Fire alarm input 1    
ON
When receiving fire alarm
signal input.
PU PU
Condensation overflow
(Internal drain pump)
3   
When drain pan float switch
is OFF continuously for 60
seconds.
E07 E07
Condensation overflow
(Optional condensate
pump)
3   
When optional drain pan float
switch is OFF continuously
for 60 seconds.
HP HP
High-pressure signal
detected
-
OFF
When high-pressure switch is
activated 2 times in 24 hours
from first detection.
ON
When high-pressure switch is
activated 3-7 times in 24
hours from first detection.
High-pressure
protection activated
4  
When high-pressure switch is
OFF eight times.
E01 E01
WMC room thermistor
(RTS1) failure
2
   
When an abnormality is
detected.
E02 E02
Evaporator inlet air
thermistor (RTS2) failure
  
E03 E03
Condenser inlet air
thermistor (ODS) failure
  
E04 E04
Condenser thermistor
(CTS1) failure
 
E05 E05
Evaporator pipe inlet
thermistor (CTS2) failure
  
E06 E06
Evaporator pipe outlet
thermistor (CTS3) failure
 
E08 E08
WMC communication
error
4  
When a communication error
between the relay board and
WMC continues for at least
10 seconds.