DIAGNOSTIC CODES
26
System High Pressure
Indoor Anti-Freeze Protection
Refrigerant Leakage Protection
Compressor High Discharge
Temperature Protection
Overcurrent Protection
Communication Malfunction
High Temperature
Resistant Protection
EEPROM Memory Malfunction
System Configuration
Malfunction
Pump Down or Gathering
Refrigerant Status
1) Over charged with refrigerant.
2) Blocked or dirty outdoor coil .
3) Extreme outdoor ambient conditions
1) Low return airflow.
2) Indoor fan speed is too low.
3) Indoor coil is blocked or dirty.
1) refrigerant leak(s).
2) Indoor coil temperature sensor no calibrated.
3) Refrigerant flow is restricted ( ex. valve, exv, debris)
Please refer to the malfunction analysis (discharge
temperature, overload) in service manual.
1) Supply voltage is unstable.
2) Supply voltage is too low and system load is too high.
3) Indoor coil is blocked or dirty.
1) Communication cable is mis-wired between indoor
and outdoor units.
2) Indoor or Outdoor control board malfunction.
1) Incorrect refrigerant charge level.
2) Refrigerant metering device malfunction.
3) Compressor malfunction.
Control board malfunction.
1) No jumper cap inserted on the control board.
2) Incorrect or damaged jumper cap on control board.
3) Indoor and outdoor units are not compatible.
Optional Service Mode
E1
E2
F0
E4
E5
E6
E8
EE
C5
Fo
Yellow
3 flashes
and
1 sec Off
7 flashes
and
1 sec Off
5 flashes
and
1 sec Off
Continuous
On
6 flashes
and
1 sec Off
11 flashes
and
1 sec Off
17 flashes
and
1 sec Off
Red
9 flashes
and
1 sec Off
Troubleshooting
The Crown System has on board diagnostics. The outdoor unit will provide status indicators.
The indoor wall unit and remote controller will display error codes. The following is a summary
of the codes with explanation:
Indoor Unit
Display
Outdoor Unit Indicators
Malfunction Name
Possible Causes
