61
Technical Information
No.
Error code
Malfunction
name
Origin of
malfunction signal
Control description
16
H4
Overload
protection
Evaporator
temperature,
condenser
temperature
If outdoor unit detects that the tube temperature is higher
than protective temp. value, the unit will report overload
protection. The unit will not restart operation until tube
temperature is lower than the protective temp. value and
the compressor is stopped for 3min. If the protection occurs
over 6 times, the unit cannot be recovered automatically.
Switch off the unit or re-energize the unit after cutting off
power to eliminate this protection.
17
H6
Malfunction
of outdoor fan
motor
Outdoor fan motor
If the outdoor unit does not receive signal from outdoor fan
motor for 30s successively when the fan motor is operating,
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
cannot be recovered automatically. Switch off the unit or
re-energize the unit after cutting off power to eliminate this
malfunction.
18
U7
Direction
changing
malfunction of
4-way valve
4-way valve
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 10min successively,
direction changing malfunction of 4-way valve will be
reported and the outdoor unit will stop operation. The
unit can automatically resume operation in the first two
malfunctions. If the malfunction occurs 3 times, the unit
cannot be recovered automatically. Switch off the unit or
re-energize the unit after cutting off power to eliminate this
malfunction.
19
P6
Communication
malfunction
between main
control and drive
Communication
between main
control board and
drive board
If the outdoor main control board does not receive data
from drive board, communication malfunction between
main control and drive will be reported. This malfunction
can be eliminated automatically.
20
EE
Malfunction of
outdoor main
control memory
chip
Outdoor main
control board
If the memory chip of outdoor main control board is broken,
the unit cannot be started. The unit cannot be recovered
automatically. If the malfunction cannot be eliminated
after switching off the unit and then energizing the unit
for several times, please replace the outdoor main control
board.
