DIAGNOSTIC CODES
No.
14
15
16
17
18
19
20
Description
If the memory chip of outdoor drive circuit board fails, the unit will
not start. The unit will not recover automatically. If thermo junction
cannot be eliminated after switching off the unit and then energizing
the unit several times, replace the outdoor drive circuit board.
If outdoor unit detects the compressor overload switch open within
3-sec successively, the unit will report compressor overload protection.
If the fault occurs successively 3 times, the unit will not recover
automatically. Switch off the unit or re-energize the unit to eliminate
this protection.
If indoor unit detects the evaporator coil temperature is higher
than protective temp. value, the unit will report overload protection.
The unit will restart operation after evaporator temperature is lower
than the protective temp. value and the compressor is stopped for
3-minutes. If the protection occurs over 6 times, the unit will not
recover automatically. Switch off the unit or re-energize the unit
to eliminate this protection.
If outdoor unit does not receive feedback signal from outdoor fan
motor for 30-sec successively when the fan motor is operating, an
outdoor fan motor malfunction will be reported. In this case, the unit
can automatically resume operation after stopping. If the malfunction
occurs 6 times within one hour, the unit will not recover automatically.
Switch off the unit or re-energize the unit to eliminate this malfunction.
After the compressor starts operation in heating mode, if the outdoor
unit detects the difference between evaporator temperature and
indoor ambient temperature is lower than the protective value for
10-min successively, Reversing Valve Malfunction will be reported
and the outdoor unit will stop operation. If the malfunction occurs
3 times, the unit will not recover automatically. Switch off the unit
or re-energize the unit to eliminate this malfunction.
If the outdoor main control board does not receive data from drive
board, communication malfunction between main control and drive
will be reported. The malfunction will be eliminated automatically.
If the memory chip on the outdoor main control board fails, the
unit will not start. The unit will not recover automatically. If thermo
junction cannot be eliminated after switching the unit off and on
for several tries, replace the outdoor main control board.
Error
Code
ee
H3
H4
H6
U7
P6
EE
Malfunction
Name
Outdoor
Drive
Memory Chip
Malfunction
Compressor
Overload
Protection
Overload
Protection
Outdoor
Fan Motor
Malfunction
Reversing or
4-way Valve
Malfunction
Main Control
and Drive
Communication
Malfunction
Outdoor
Main Control
Memory Chip
Malfunction
Origin of
Malfunction
Outdoor Drive
Board
Compressor
Overload
Switch
Evaporator
Temperature,
Condenser
Temperature
Outdoor
Fan Motor
Reversing/
4-way Valve
Communication
Failure Between
Indoor and
Outdoor Main
Board
Outdoor
Main Control
Board
Error Codes
29
