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Troubleshooting
9. Troubleshooting
9.1 Error Code List
Error
Code
Name of malfunction and
status
Way of display
Error
Type
Possible Causes
Solution
Display
directly
By remote
conrol
procedure
only
By remote control
procedure within
compressor stop
200s or direcly
after compressor
stop 200s
CL
Filter cleaning reminder
√
Indoor Filter may have dust
Clean the fliter
d0
Compressor RMS phase
current limit down
√
Outdoor
Compressor phase current
effective value is too high,
the compressor need to limit
the frequency or frequency
reduction operation
The normal limit frequency
reduction function.
d1
RMS machine current
limit down
√
Outdoor
The whole unit current
effective value is too high,
compressor need to limit
the frequency or frequency
reduction operation
The normal limit frequency
reduction function.
d2
Exhaust gas temperature
limit down
√
Outdoor
The Exhaust pipe
temperature is too high,
compressor need to limit
the frequency or frequency
reduction operation
The normal limit frequency
reduction function.
d3
Anti-freeze limit down
√
Outdoor
The inner pipe temperature
is too low, compressor
need to limit the frequency
or frequency reduction
operation
The normal limit frequency
reduction function.
d4
Overload limit down
√
Outdoor
The system is overload,
compressor need to limit
the frequency or frequency
reduction operation
The normal limit frequency
reduction function.
d5
IPM temp limit down
√
Outdoor
The compressor module
temperature is too high,
compressor need to limit
the frequency or frequency
reduction operation
The normal limit frequency
reduction function
E0
High discharge temp
protection
√
Outdoor See Diagram 1
See Diagram 1
E1
Overload protection
√
Outdoor See Diagram 2
See Diagram 2
E2
Compressor overload
protection
√
Outdoor See Diagram 3
See Diagram 3
E3
Anti-freeze protection
√
Outdoor
1. Indoor machine return air
is not smooth.
2. The fan speed is too low.
3. The filter or evaporator
not clean.
4. The inner temperature
sensor abnormal.
1. Indoor machine return air
is not smooth.
2. The fan speed is too low.
3. The filter or evaporator
not clean.
4. Change the temperature
sensor abnormal.
E7
4 way valve malfunction
√
Outdoor
1.Supply voltage is unstable
2.Mainboard and 4-Way
valve unconnected.
3.4-Way valve is broken.
1.Check the voltage of
power supply.
2.Check the connecting of
mainboard and 4-way valve.
3.Change the 4-Way valve.
E8
Outdoor ambient
temperature abnormal
protection
√
Outdoor
1. The outdoor environment
temperature is too high or
too low.
2. The outdoor environment
temprature sensor is damage.
1. The outdoor environment
temperature is in normal
range.
2. Change the temprature
sensor.
H0
Compressor stalling
√
Outdoor See Diagram 4
See Diagram 4
H1
Start up failure
√
Outdoor See Diagram 5
See Diagram 5
