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7.1 Error Codes: Overview
If an error code appears on the unit user, please contact the installation personnel and inform them of the error code,
device model, and serial number (you can find the information on the nameplate of this unit).
Table 7.3 Error code
Error
Error description
code
Communication error between main board and
H0
compressor drive board
H4
Inverter-module protection
H5
3 times of P2 protection in 30 minutes
H7
Qty. of indoor units mismatching
H8
High pressure sensor error
M-HOME for the indoor and outdoor units does not match
HF
Phase sequence error
E1
Communication error between indoor and master unit
E2
T3 or T4 temperature sensor error
E4
Abnormal power supply voltage
E5
DC fan motor error
E6
E6 protection appears 6 times in 1 hour
Eb
E7
Discharge temperature sensor error
TL sensor fault
EH
High pressure protection
P1
Low pressure protection
P2
Compressor current protection
P3
Discharge Temp. protection
P4
High Temp. protection of condenser
P5
Typhoon protection
P8
Inverter module Temp. protection
PL
Inverter compressor module error
L0
DC bus low voltage protection
L1
DC bus high voltage protection
L2
MCE error
L4
Zero speed protection
L5
L7
Phase sequence protection
Compressor frequency variation greater than 15Hz
L8
within one second protection
Actual compressor frequency differs from target
L9
frequency by more than 15Hz protection
F1
DC bus voltage error
bH
PED protection board error
bL
High pressure switch protection on driver board
Remarks
Irrecoverable
Irrecoverable
Irrecoverable
Irrecoverable
DC bus voltage error
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