3
6. Error code
Use
1
80
P 0 5
P 0 6
P 0 7
P 0 8
P 0 9
Pa
P b
Pc
Unit working statue
Unit work ing st atue
Failure
Code
Type
1.
Check whether set temperature for cooling is too low;
whether system has too small water flow rate; check
water system especially the filter.2.Check whether
system has not enough refrigerant inside by measuring
the evaporating pressure. 3.Check whether ambient
temperature is lower than 15
℃
.
System 1 indoor anti-freezing
protection in cooling
Compressor of system 1
speed down or stop
1.
Check whether set temperature for cooling is too low;
whether system has too small water flow rate; check
water system especially the filter.2.Check whether
system has not enough refrigerant inside by measuring
the evaporating pressure. 3.Check whether ambient
temperature is lower than 15
℃
.
Compressor of system 2
speed down or stop
System 2 indoor anti-freezing
protection in cooling
System water flow rate is less than minimum allowable
flow rate. If the same protection happens over 3 times in
certain period of time, unit will not restart and show
"too small water flow rate failure". Check the water
system, especially the filter; check the working statue of
water pump.
Unit will restart after 3
minutes
Too small water flow rate
protection
Compressor stops if water outlet is lower than 5
℃
in
cooling mode. Check whether temperature sensor Tc is
OK and well connected; whether set water temperature
too low; whether system flow rate too small.
Compressor stops
Compressor stops
Water outlet Temp. too low
protection in cooling
Compressor stops if water outlet is higher than 57
℃
in
heating or hot water mode. Check whether temperature
sensor Tc and Tw is OK and well connected; whether
set water temperature too high; whether system flow
rate too small.
Water outlet Temp. too high
protection in heating/hot water
Compressor stops and auxiliary heater works if water
inlet temperature is too low
℃
in heating and hot water
mode. Compressor restarts when this temperature raise
up. This is a protection for protecting the safety of the
compressor, as too low water temperature in heating or
hot water mode may kill the compressor.
Compressor of system
1 stops and auxiliary
heater starts
System 1 Water inlet Temp. too
low protection in heating/hot
water
Compressor stops and auxiliary heater works if water
inlet temperature is too low
℃
in heating and hot water
mode. Compressor restarts when this temperature raise
up. This is a protection for protecting the safety of the
compressor, as too low water temperature in heating or
hot water mode may kill the compressor.
Compressor of system 2
stops and auxiliary
heater starts
System 1 Water inlet Temp. too
low protection in heating/hot
water
When unit is turned OFF, if ambient temperature and
water temperature is low, water system has the risk of
freezing up. Thus it is necessary to havethe circulation
pump starts to circulate the water in the system, for
anti-freezing purpose.
Circulation pump
circulates for 1 minute
in every 10 minutes
Water system anti-freezing
protection stage 1
When unit is turned OFF, if ambient temperature and
water temperature is too low, unit will start to work
automatically to heat the water up to a minimum safe
level. This is a minimum protection for protecting to
help preventing the water system from freezing up.
Other soltuions must be added according to local
regulations to ensure the safety of water system.
Compressor starts
automatically.
Water system anti-freezing
protection stage 2
Pd
Failure
【
】
Failure for indoor unit