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Specifications subject to change without notice. SG-38MHRC-01
Outdoor Unit Diagnostic Guide
Table 13 — Outdoor Unit Diagnostic Guide
O (light) X (off)
(flash)
OPERATION LAMP
TIMER LAMP
DISPLAY
LED STATUS
1 time
X
E0
Indoor unit EEPROM parameter error
2 times
X
E1
Indoor / outdoor units communication error
3 times
X
E2
Zero-crossing signal detection error
4 times
X
E3
Indoor fan speed has been out of control
5 times
X
E4
Indoor room temperature sensor T1 open circuit or short circuit
6 times
X
E5
Evaporator coil temperature sensor T2 open circuit or short circuit
7 times
X
EC
Refrigerant leakage detection
1 time
O
F0
Overload current protection
2 times
O
F1
Outdoor ambient temperature sensor T4 open circuit or short circuit
3 times
O
F2
Condenser coil temperature sensor T3 open circuit or short circuit
4 times
O
F3
Compressor discharge temperature sensor T5 open circuit or short
circuit
5 times
O
F4
Outdoor unit EEPROM parameter error
6 times
O
F5
Outdoor fan speed has been out of control
1 time
P0
IPM malfunction or IGBT over-strong current protection
2 times
P1
Over voltage or over low voltage protection
3 times
P2
High temperature protection of IPM module or compressor top
4 times
P3*
Outdoor ambient temperature too low.
5 times
P4
Inverter compressor drive error
6 times
P5
Indoor units mode conflict (multi-zone ONLY)