Denso MovinCool CLIMATE PRO K63 Service Manual page 17

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
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
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)
17
SOLUTION
Repair leak and add refrigerant based
on the weight listed on specifications or
nameplate
1. Replace compressor
2. Press CLEAR button to reset
Reconnect thermistor
Replace thermistor
Reconnect thermistor
Replace thermistor