Troubleshooting Guide

8.3.2 Outdoor unit’s digital display LED will display the following information except in the checking
mode as described above:
 In standby , the LED displays “- -”

During the compressor is operating, the LED display the running frequen
cy,

In defrosting mode, The LED displays “dF” or alternatively displays between running
frequency
and “dF” (each displays 0.5s)
 During compressor pre-heating, The LED displays “PH” or alternatively displays between
running freq
uency and “PH” (each displays 0.5s)
 During the oil return process, The LED displays “RO” or altern
atively displays between running
frequency and “RO” (each displays 0.5s)

In low ambient cooling mode, the LED displays “LC” or alternat
ively displays between running
frequency and “LC” (each displays 0.5s)

In forced cooling mode, the LED displays “FC” or alternatively
displays between running
frequency and “FC”(each displays 0.5s)

When PFC module protection occurs three times within 15 minutes, the LED displa
ys “E6” or
alternatively displays bet
ween running frequency and “E6” (each displays 0.5s)
 In case of protection or malfunction, the LED displays error code or protection code.
8.3.3 Outdoor unit error display codes
Display LED STATUS New indoor Error
E0 Outdoor unit EEPROM parameter error
F4
E2 Communication malfunction between indoor and outdoor units
E1
E3
Communication malfunction between IPM board and outdoor main control
board
——
E4
Outdoor temperature sensor (coil sensor T3,ambient sensor T4, Compressor
discharge sensor T5、indoor coil outlet pipe sensor T2B) malfunction
F2/F1/F3/F6
E5 Over-voltage or under-voltage protection
P1
E6 PFC module protection
——
E8 Outdoor fan speed malfunction
F5
F1 No. A Indoor unit coil outlet temp. sensor malfunction
——
F2 No. B Indoor unit coil outlet temp. sensor malfunction
——
F3 No. C Indoor unit coil outlet temp. sensor malfunction
——
F4 No. D Indoor unit coil outlet temp. sensor malfunction
——
F5 No. E Indoor unit coil outlet temp. sensor malfunction
——
F6 No. F Indoor unit coil outlet temp. sensor malfunction
——
P1 High pressure protection
P6
P2 Low pressure protection
P6
P3 Current overload protection
F0
P4 Temperature protection of compressor discharge
——
P5 Condenser high temperature protection
——
P6 Inverter module (IPM) malfunction P0
LP Low ambient temperature protection
——