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Troubleshooting
This unit has onboard diagnostics. Error codes will appear on the LED display on the front panel of the
indoor unit in place of the temperature display. The table below explains the error codes for both units.
START-UP AND TROUBLESHOOTING
Explain Following Items To Customer With The Aid Of The Owner’s Manual:
1. How to turn system on and off; selecting COOLING, HEATING and other operating modes;
setting a desired temperature; setting the timer to automatically start and stop system
operation; and all other features of the Remote Control and display panel.
2. How to remove and clean the air filter.
3. How to set air with the swing louvers.
4. Explain care and maintenance.
5. Present the Owner’s Manual and installation instructions to customer.
DIAGNOSTIC CODES
Equipment Fault
Indoor Configuration Jumper
Indoor/Outdoor Mismatch
High Current Protection
Communication Error
Indoor Air Temp. Thermistor
Indoor Coil Temp. Thermistor
Outdoor Air Temp. Thermistor
Outdoor Coil Temp. Thermistor
Compressor Discharge Temp. Thermistor
Compressor Overload Protection
IPM Module Protection
Indoor Fan Malfunction
Compressor Synchronism
4-Way Valve Malfunction
Possible Causes
Missing Configuration Jumper on Indoor Control Board
Indoor and Outdoor Units Do Not Match (Model or Capacity)
Power Supply is not Stable and Voltage Range is too Large
Mis-wired or Communication Failure
Bad Connection, or Indoor Air Sensor Failure
Bad Connection, or Indoor Coil Sensor Failure
Bad Connection, or Outdoor Ambient Sensor Failure
Bad Connection, or Outdoor Coil Sensor Failure
Bad Connection, or Discharge Sensor Failure
Low Refrigerant Charge, Blocked Capillary, or Compressor Motor Failure
IPM Module Temperature Too High, High Ambient, Low Voltage, or Bad Connections
Indoor Fan Stopped or Running too Slow
High Pressure, Low Voltage, or Bad Connections
Bad Connection, Solenoid Failure, or Valve Malfunction. ( Heat Pumps Only)
Error Codes
C5
LP
E5
E6
F1
F2
F3
F4
F5
H3
H5
H6
H7
U7