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10.1 Indoor Unit Error Display
Display LED STATUS
E0 EEPROM parameter error
E1 Indoor / outdoor units communication protection
E2 Zero-crossing signal error
E3 Fan speed out of control
E5 Open or short circuit of outdoor temperature sensor
E6 Open or short circuit of room or evaporator temperature sensor
P0 IGBT over-strong current protection
P1 Over voltage or too low voltage protection
P2 Temperature protection of compressor top.
P4 Inverter compressor drive error
Note: E4 & P3: Reserved function
10.2 Outdoor Unit Error Display
Outdoor display function
Operation state lamp LED1 (yellow) is controlled by outdoor main chip. After power is on, it blinks at a frequency
of 0.2Hz when the unit is in standby mode. It illuminates when the unit is in operation. It blinks at a frequency of
2.5Hz when the unit has any malfunctions.
Power supply lamp LED4 (red) is controlled by outdoor +5v power source. It illuminates after power is on.
LED5 (red) and LED6 (green) are controlled by compressor drive chip, display codes are as following:
malfunction LED6 (green) LED5 (red) Indoor display
O O P1
Normal standby O ×
MCE malfunction
O ☆ P1
Normal operation O O
MCE start malfunction
× ☆ P4
MCE phase lack protection, MCE zero
speed protection, PWM in-phase
malfunction
☆ O P4
IGBT over-strong current
☆ × P0
Communication malfunction
☆ ☆ P4
Remarks: (1) ○—Bright ×—Extinguished ☆—Blink
(2) blink at a frequency of 2.5Hz
(3) malfunction codes display time according to the actual protection time
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