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75
FlexFit Pro
Error
code
Malfunction Description Diagnosis and Analysis Remark
19 DC voltage or AC voltage low
AC power supply of the driver module get voltage
lower than 155VAC or driver module get high DC-BUS
voltage lower than 180VDC.
Resumable
20
Indoor pipe temperature too high
protection
Indoor pipe temperature Tm over 63°C, error clear
within 3 minutes if temperature goes down and lower
than 52°C.
Resumable
22 PFC circuit loop overcurrent
Overcurrent been detected in power factor correction
circuit loop.
Resumable
23
Temperature too high for
compressor driver module
Compressor driver module’s PIM temperature over
90°C, Error stat-us lock if it occurs 3 times in 1 hour.
Non-resumable
24 Compressor start failure
Compressor start failure been detected by driver driver
module.
Non-resumable
25
Input overcurrent of the drive
module
Input current of the compressor drive module higher
than 32A (double fan model) or 27A (single fan) , Lock
if it occurs 3 times in 1 hour.
Non-resumable
26 Lack phase of the drive module
Lack phase of the drive module’s power supply.(three
phase type)
Non-resumable
27
Input current sampling circuit
fault
The driver module’s input current sampling circuit
damaged.
Resumable
28 No wiring of the compressor No wiring between compressor and it’s driver module. Non-resumable
37
Compressor overcurrent detected
by compressor driver module
Compressor phase U or V or W current over 27A
(single phase model) or 19.1A (single phase model)
occured during non-rated period.
Resumable
38
Drive module’s ambient temp.
sensor abnormal
The temperature detected is not within the range of
-25°C to 150 °C.
Resumable
39
Mid-condenser temp. sensor TC
abnormal
The temperature detected is not within the range of
-55°C to 90 °C.
Resumable
42 High pressure switch abnormal
After compressor running for 3 minutes, switch been
detected open circuit for 30seconds, Error lock if it
occurs 3 times in 1 hour.
Non-resumable
43 Low pressure switch abnormal
After compressor running for 3 minutes, switch been
detected uncon-nected for 60seconds or unconnected
for 30seconds at standby.
Non-resumable
44
Outdoor condenser
temperatureTC too high
protection
The maximum temperature value of Tc and Te is over
65 °C, Error lock if it occurs 3 times in 30 minutes.
Non-resumable
45 System low pressure protection
The minimum temperature value of indoor pipe Tm
and outdoorTs is lower than-45 °C at cooling mode or
minimum temperature value of outdoor Tc and outdoor
Te is lower than-45 °C.
Non-resumable
Note:
1. The ou.tdoor control board’s LED3 indicates the outdoor error code. for example, the error code 12, LED3 will
display 12 and keep ashing.
2. Non-resumable means error will not clear unless: a. clean the fault factor b. Turn off the power supply and
turn on again after point a achieved.
3. The indoor unit can also indictes the outdoor malfuction code too. Please refer to indoor unit manul to get the
method.
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