32801000302
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Specifications subject to change without notice.
TROUBLESHOOTING
For ease of service, the systems are equipped with diagnostic code
display LEDs on both the indoor and outdoor units. The outdoor
diagnostic display consists of two LEDs (Red and Green) on the
outdoor unit board and is limited to a few errors.
The indoor diagnostic display is a combination of flashing LEDs on the
display panel or the front of the unit. If possible, always check the
diagnostic codes displayed on the indoor unit first.
The diagnostic codes displayed in the indoor and outdoor units are
listed in Table 11.
INDOOR UNIT DIAGNOSTIC GUIDES
Table 11—Indoor Unit Diagnostic Guides
OPERATION
LAMP
TIMER
LAMP
DISPLAY
LED STATUS
H
1 time
X
E0
Indoor unit EEPROM parameter error
H
2 times
X
E1
Indoor / outdoor units communication error
H
8 times
X
EE
Water level alarm malfunction
H
9 times
X
E8
Dual indoor unit (twin model only) communication malfunction
H
10 times
X
E9
Other twin model malfunction
H
1 time
O
F0
Overload Protection
H
7 times
O
F6
Compressor low-pressure protection
H
4 times
X
E3
Indoor fan speed has been out of control
H
5 times
X
E4
Indoor room temperature sensor T1 open circuit or short circuit
H
6 times
X
E5
Evaporator coil temperature sensor T2 open circuit or short circuit
H
7 times
X
EC
Refrigerant leakage detection
H
11 times
O
Fa
Indoor unit communication malfunction
H
2 times
O
F1
Outdoor ambient temperature sensor T4 open circuit or short circuit
H
3 times
O
F2
Condenser coil temperature sensor T3 open circuit or short circuit
H
4 times
O
F3
Compressor discharge temperature sensor T5 open circuit or short circuit
H
5 times
O
F4
Outdoor unit EEPROM parameter error
H
6 times
O
F5
Outdoor fan speed has been out of control
H
1 time
H
P0
IPM malfunction or IGBT over-strong current protection
H
2 times
H
P1
Over voltage or over low voltage protection
H
3 times
H
P2
High temperature protection of compressor top diagnosis and solution (9k,12k models only)
H
4 times
H
P3
Outdoor low temperature protection
H
5 times
H
P4
Inverter compressor drive error
H
7 times
H
P6
Compressor low-pressure protection
H
8 times
H
P7
Outdoor IGBT sensor error
O(light) X(off)
H
(flash)
For additional diagnostic information, refer to the Service Manual.
