Gree U-MATCH GUHD09NK3CO

A/A DC INVERTER U-MATCH AIR CONDITIONERS MAINTENANCE
104
Table 4 Main board dual 8 numeral tube Display Codes for Outdoor Unit
Note:This table except GUHD09NK3CO/GUHD12NK3CO
Malfunction Item
Outdoor unit display of
dual 8 numeral tube
Indoor Unit Display
DC busbar overvoltage protection PH E5
Overheat protection of radiator P8 E5
Current sensor malfunction Pc E5
Carbon fin sensor malfunction P7 E5
Compressor current protection P5 E5
Low voltage protection PL E5
Compressor startup failure Lc E5
PFC abnormality Hc E5
Compressor clogged LE E5
Drive resetting P0 E5
The compressor motor in loss of synchronization H7 E5
Missing phase, Speed discard Ld E5
Malfunction from driving part to main-control
communication
P6 E5
IPM module protection H5 E5
Compressor over speed LF E5
Sensor connection protection Pd E5
Temperature drift protection PE E5
A
C contactor protection P9 E5
High-pressure protection E1 E1
Low-pressure protection E3 E3
Exhaust protection E4 E4
Compressor overload protection H3 E5
Communication malfunction (among indoor unit,
outdoor unit and wired controller)
E6 E6
Outdoor ambient temperature sensor malfunction F3 F3
Coil pipe intermediate temperature sensor malfunction
of outdoor unit
F2 F2
Exhaust temperature sensor malfunction F4 F4
Defrosting (non-malfunction) 08 defrost
Oil return (non-malfunction) 09 no display
Mismatch of indoor unit model LP no display
A
C current protection (input side) PA E5
Driver board environment temperature senso
r
malfunction
PF E5
A
C input voltage abnormalit
y
*
PP E5
Electrification loop malfunction *
PU E5
2 FLOW CHART OF TROUBLESHOOTING
2.1 System Troubleshooting
Service personnel shall collect the malfunction information as much as possible and research them thoroughly,
list these electrical parts which may cause malfunction, service personnel shall be able to determine the specific
reason and solve the faulted parts.
Observe the status of the complete device and do not observe the partial
It is advised to start from the simple operation during analyzing, judging and confirming malfunction reason, then
conduct the complicated operations such removal of device, part replacement and refrigerant filling.
Find the malfunction reason carefully as unit may occur several malfunction at the same time and one malfunction
may develop into several malfunction, so entire system analysis shall be established to make the judged result exact
and credible.