Self-Diagnostic Codes - Denso MOVINCOOL Climate pro k18 Service Manual

Self-Diagnostic Codes

When a self-diagnostic code is displayed on the LCD, the unit stops operation, relay contact RL07
for terminal OS-1 and OS2 is closed.
CODE CONDITION
Alarm device 1 is
AL1
activated
Alarm device 2 is
AL2
activated
FL Drain tank is full
Condensate pump safety
PU
switch is activated
Cooling function failure
occurs 3 times and
CF following condition
continues for 15 minutes
RTS - CTS1 < 9 °F (5 °C)
E1 RTS thermistor failure
E3 CTS1 thermistor failure
POSSIBLE CAUSE
Alarm device connected to
FA-1 and FA-2 of terminal
block 1 is activated
Alarm device connected to
AL-1 and AL-2 of terminal
block 1 is activated
Drain tank is full of water
Loose drain switch connection
Defective drain switch
Condensate pump stops due
to kinks and/or blockage or
improper routing of drain line
Missing or loose jumper
connector
Defective condensate pump
Insufficient refrigerant or
refrigerant leak
Defective compressor
Loose RTS thermistor
connection
Defective RTS thermistor
(short or open circuit)
Loose CTS1 thermistor
connection
Defective CTS1 thermistor
(short or open circuit)
16
SOLUTION
1. Check FA-1, FA-2 connection
2. Identify and correct condition causing
alarm
3. Press CLEAR button to reset
1. Check AL-1, AL-2 connection
2. Identify and correct condition causing
alarm
3. Press CLEAR button to reset
1. Empty tank
2. Place tank back in unit
3. Press CLEAR button to reset
1. Reconnect switch
2. Press CLEAR button to reset
1. Replace switch
2. Press CLEAR button to reset
1. Remove blockage or kinks from drain
line, or re-route drain line
2. Press CLEAR button to reset
1. If the jumper connector is missing,
insert one
If connector is loose, reconnect it
2. Press CLEAR button to reset
1. Replace pump
2. Press CLEAR button to reset
Repair leak and add refrigerant based
on the weight listed on specifications or
nameplatet
1. Replace compressor
2. Press CLEAR button to reset
Reconnect thermistor
Replace thermistor
Reconnect thermistor
Replace thermistor