Haier 1UH071N1ERG [181/238] Smart power
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Haier 1UH071N1ERG [181/238] Smart power

Haier 1UH071N1ERG [181/238] Smart power
179
Smart Power
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
21
Indoor pipe sensor
temperature too low
protection
Indoor pipe temperature too low,outdoor unit stop to
prevent indoor heat exchange system icing and to
prevent the indoor unit outlet air too low at the same time
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. NO-resumable means error will not clear unless: a. clean out the fault factor b. Cut the power supply off and
reoffer 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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