V-HEAT SERIES · AIR/WATER SYSTEM
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Page 35 of 72
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Malfunction
LCD Controller
Reason
Resolution
Water inlet temp. sensor failure
PP01
The sensor is open or short circuit
Check or change the sensor
Water outlet temp. sensor
failure
PP02
The sensor is open or short circuit
Check or change the sensor
Cool1 sensor1 failure
PP03
The sensor is open or short circuit
Check or change the sensor
Cool2 sensor2 failure
PP04
The sensor is open or short circuit
Check or change the sensor
Ambient sensor failure
PP05
The sensor is open or short circuit
Check or change the sensor
Temp. differential between
water-in and water-out is too
large
PP06
Water flow volume not enough.
Water pressure different is too low
Check the water flow volume
or system obstruction
Anti freezing under cooling
mode
PP07
Outlet water is too low
Check the water flow volume
or outlet water temp. sensor
The first time freezing
protection in winter
PP07
Ambient or inlet water temp. is too
low
The second time freezing
protection in winter
PP07
Ambient or inlet water temp. is too
low
Malfunction of system 1
EE01
System 1 protection was failed
Check each protection point
of system 1 remove the
malfunction according to
system production board
malfunction table
Malfunction of system 2
EE02
System 2 protection was failed
Check each protection point
of system 2 remove the
malfunction according to
system production board
malfunction table
Flow switch failure
EE03
No water/litter water in water
system.
Check the water flow volume,
water pump is failure or not
Power supply connections
wrong
EE04
Wrong connections or lack of
connection
Check connections of power
cable
Power supply connections
wrong
no display
High/low pressure
EE04
Gas change too low or high.
Possible system blockage
Check through each pressure
switch and return circuit
3 times water-in and water-out
temp. difference protection 30
minutes
EE05
Water flow rate not enough
Check the water flow rate, or
water system is jammed or
not
Defrosting
Defrost Code
Display
Communication failure
EE08
LCD controller and The PCB
connection failure
Check the wire connection