7. TROUBLESHOOTING
Malfunction
LED1 LED2
Standby
Running
Ambient
sensor
failure
High pressure
protection
Low pressure
protection
Waterpressure
switch failure
Low ambient
temperature
protection
40
LED3 LED4 Solution
x
x
x
x
x
x
x
x
x
x
-
-
Check the cable
connection of the ambient
temp. sensor/ replace a
new sensor
Refrigerant system
pressure is high, check
pressure gauge, increase
the water volume
Refrigerant system
pressure is low, check
pressure gauge, refeed
refrigerant
Check the water inlet/
outlet connection is correct
or not, increase the water
volume
Air temp lower than 8
C,
O
stop the heat pump until
temp over 8
C.
O
EN