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4.5 . System Protection and Error Codes
If error
，
unit display―Ex‖ ―Px‖ or―Fx‖
。
For example
：
E2
、
P5
code
meaning
LED2
remark
E1
compressor overheat or discharge
high temp protection
red and flash
Decided by outdoor unit
E2
Outdoor air temp sensor error
Flash 3 times
Outdoor air temp sensor open circuit or short circuit
E3
pipe or return air temp sensor error
Flash 6 times
(1)temp sensor open circuit or short circuit
(2) suck sensor open or short circuit
E4
AC return water temp sensor error
red and flash
Stop compressor when running AC
E5
AC leaving water temp sensor error
red and flash
Stop compressor when running AC
E6
DHW temp sensor error
red and flash
Stop compressor when running AC
E7
solar water temp sensor error
As normal
Not stop compressor
E8
fan coil high temp protection
red and flash
Water source anti freeze protection
E9
system anti freeze twice
red and flash
Stop compressor
EA
DHW anti freeze twice
red and flash
Stop compressor
EB
indoor refrigerant pipe sensor error
No flash
Temp sensor open circuit or short circuit
EC
water source inlet water sensor error
No flash
Temp sensor open circuit or short circuit
ED
water source leaving temp sensor
No flash
Temp sensor open circuit or short circuit
EE
water source anti freeze protection
No flash
1.Water source heat exchange not efficient or water source temp
too low 2.Water source water flow volume not enough
EF
water source water flow not enough
No flash
Water source water flow volume not enough
EG
Indoor ambient sensor error
No flash
Temp sensor open circuit or short circuit
F1
aaavoltage protection
Flash 1 time
Voltage is too high or too low, heat pump will recover when
voltage be normal (165~265VAC)
F2
power module PFC error
Red and flash
IPM module error or wire connection wrong
F3
compressor abnormal stop
Red and flash
compressor stops abnormally
F4
outdoor module radiator sensor error
Flash 5 time
Temp sensor open circuit or short circuit
F5
outdoor current sensor error
Flash 8 time
Current sensor fault or no test wire cross it
F6
IPM error or Module control board
error
Red and flash
Communication not good or IPM module fault
F7
compressor fail to start up
Red and flash
Compressor cannot start properly
F8
outdoor over current
Red and flash
Compressor current is too high
F9
Discharge sensor error
Flash 7 time
Temp sensor open circuit or short circuit
FA
Outdoor module overheat, over
current
Flash 5 time
IPM module temp too high or compressor current too
high
FB
/E8
outdoor coil over heat
Flash 15 time
Outdoor heat exchange not good
P1
high pressure protection
Flash 2 time
1.refrigerant volume too much 2.throtting part error, 3. High
pressure switch error
P2
low pressure protection
Flash 9 time
1.refrigerant volume too little 2.throtting part error, 3. low
pressure switch error
P3
compressor discharge air over heat
protection
Flash 10 time
1.Refrigerant too little, 2.throtting part error
P4
over current protection
Flash 11 time
1.refrigerant volume too much 2.throtting part error, 3. Current
sensor error
P5
indoor unit water flow error
No flash
1.Water flow volume too small 2. Water flow switch error
P6
outdoor water flow error ( For GH)
Flash 17 time
1.Water source side waterflow volume too small 2. Water
source side Water flow switch error
P7
miss phase
Red and flash
Power supply error
P8
wrong phase
Red and flash
power supply error
P9
communication error
Red and flash
Communication wire open or PCB error
4.6 : System Adjustable Parameter Table
Press M+▲key on wire controller for 3 seconds, it will show PXX to check and set the data
Code
name
Range
default
Remark
P00
Auto restart
（
after power supply, unit come back to the
previous working mode before power cut off
）
0
：
off
；
1
：
on
1
P01
DHW hot water temp differentia
2~15
℃，
minus differentia
2
℃
