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74
FlexFit Pro
4.2 1U24LP2VHA 1U36LP2VHA 1U48LP2VHA
Troubleshooting
Error
code Malfunction Description Diagnosis and Analysis. Remark
1EEPROM malfunction EEPROM chip damaged or data wrong or related
circuit damaged. Non-resumable
2PIM (power intelligent module)
hardware over current
Input over current occured been detected by PIM’s
hardware. Resumable
3Compressor over current during
deceleration
Over current occured during compressor deceleration
period. Non-resumable
4
Communication abnormal
between control board and
compressor driver module
Control board can not communicating with compressor
driver module over 4 minutes Resumable
5Compressor overcurrent detected
by control board
Compressor over current been detected by control
board Non-resumable
6DC voltage or AC voltage high
AC power supply of the driver module get voltage over
280VAC or driver module get high DC-BUS voltage
over 390VDC.
Resumable
7Compressor current sampling
circuit fault
The driver module’s Compressor current sampling
circuit damaged. Non-resumable
8Discharge temperature too high
protection
Compressor discharge temperature over 115°C, error
clear within 3 minutes if temperature goes down and
lower than 115°C. Error status lock if it occurs 3 times
in 1 hour.
Non-resumable
9DC fan motor fault
DC fan motor damage or not connected or related
circuit broken. Error status conrm and lock if occurs 3
times within 30 minutes.
Non-resumable
10 Outdoor defrosting temp. sensor
Te abnormal
Sensor temperature been detected below -55°C or
higher than 90°C or been detected as short circuit or
open circuit..
Resumable
11 Suction temp.sensor Ts abnormal
12 Outdoor ambient temp. sensor Ta
abnormal
Sensor temperature been detected below -40°C or
higher than 90°C or been detected short circuit or open
circuit.
Resumable
13 Discharging temp. sensor Td
abnormal
Sensor temperature been detected below -40°C or
higher than 150°C or been detected short circuit or
open circuit .
Resumable
14 PFC circuit loop high voltage Overvoltage been detected in driver module’s power
factor correction circuit loop. Resumable
15
Communication abnormal
between indoor unit and outdoor
unit
Outdoor unit control board can not communicating with
intdoor unit control board over 4 minutes. Resumable
16 Lack of refrigerant or discharging
pipe blocked
Discharge & suction temperatureTd-Ts≥80°C after
compressor started 10 minutes.Error status lock if it
occurs 3 times in 1 hour.
Non-resumable
17 4-way vavle converse abnormal
Indoor pipe & indoor ambient temperature
Tm-Tai≥5°C after compress- or started 10 minutes.
Error status lock if it occurs 3 times in 1 hour.
Non-resumable
18 Compressor motor
desynchronizing
Rotor desynchronizing occured, caused by overload or
load sharply uctuating or compressor current sensor
cicuit abnormal or one of the inverter’s gate drive signal
missing.
Non-resumable
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