Gree U-MATCH Series Service Manual page 86

Malfunction
No. Error code
Direction
changing
32 U7
malfunction of
4-way valve
Communication
malfunction
35 P6 between main
control and
Malfunction of
outdoor main
47 EE
control memory
48 oE
1.2 Description of Drive Malfunction
Main board dual 8 numeral tube Display Codes for Outdoor Unit of 24~60k
Malfunction Item
DC busbar over-voltage protection
IPM or PFC over-temperature protection
Current sense circuit error
IPM or PFC temperature sensor error
Compressor current protection
DC busbar under-voltage protection
Compressor startup failure
Drive module reset
Compressor motor desynchronizing
Phase loss
Drive-to-main-control communication error
IPM protection
Compressor overload protection
AC current protection (input side)
Charging circuit error
PFC protection
DC fan error
Input AC voltage abnormality
Driving board memory chip error
Origin of
malfunction
name
signal
4-way valve
Communication
between main
control board
and drive board
drive
Outdoor main
control board
chip
/ /
U-Match Series DC Inverter Service Manual
Control description
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.
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.
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.
Malfunctions of outdoor unit, please refer to status of error
indicator in outdoor unit
Indoor Unit Display
PH
P8
Pc
P7
P5
PL
Lc
P0
H7
Ld
P6
H5
H3
PA
PU
HC
H6
PP
ee
83
Outdoor unit display of dual 8
numeral tube
PH
P8
Pc
P7
P5
PL
Lc
P0
H7
Ld
P6
H5
H3
PA
PU
HC
H6
PP
ee