HCW PASHW030 - 5.2 Trouble Shooting Guide

 The operation pressure of the refrigerant system should only be serviced by a certified
technician.
 Check the power supply and cable connection often. Should the unit begin to operate
abnormally switch it off and contact the qualified technician.
 Discharge all water in the water pump and water system, so that freezing of the water
in the pump or water system does not occur. You should discharge the water at the bottom of
water pump if the unit will not be used for an extended period of time. You should check the
unit thoroughly and fill the system with water fully before using it for the first time after a
prolonged of no usage.
5.2 Trouble Shooting Guide
Malfunction
LED
Controller
Reason
Resolution
Water inlet temp.
Sensor failure
P01
The sensor is open or short circuit
Check or change the sensor
Water outlet temp. Sensor failure
P02
The sensor is open or short circuit
Check or change the sensor
Coil sensor failure
P05
The sensor is open or short circuit
Check or change the sensor
Ambient sensor falure
P04
The sensor is open or short circuit
Check or change the sensor
Temp. differencial between water-in
and water-out is too large
E06
Water flow volume not enough,
water pressure difference is too low
Check the water flow volume or
system obstruction
Anti freezing under cooling mode
E07
Outlet water is too low
Check the water flow volume or outlet
water temp. sensor
The first class freezing protection in
winter
E19
Ambient or inlet water temp. is too
low
The second class freezing protection
in winter
E29
Ambient or inlet water temp. is too
lower
High pressure protect
E01
Gas System pressure is too high
Check through the high pressure
switch and the gas system pressure to
judge wheter the gas loop is blocked
or the freon is suitable
Low pressure protect
E02
Gas System pressure is too low
Check through the low pressure
switch and the gas system pressure to
judge whether there is leaking or the
freon is not enough
Flow switch failure
E03
No water/little water in water
system
3times water-in and water-out temp.
difference protection in 30 minutes
E06
Water flow rate not enough
Check the water flow rate, or water
system is jammed or not
Defrosting
Defrost Code
Display
Communication failure
E08
LED controller and the PCB
connection failure
Check the wire connection
15
6. APPENDIX
Appendix 1: Connection of PCB illustration