2. Troubleshooting
High pressure protection
Wire connection error or
line interference. Check and
replace the line
Yes
Adjust the line and
eliminate the
interference
Check if the pressure switch is
damaged
Yes
Replace the pressure switch
Short circuit of the main board
protection interface
Main board is damaged.
Replace the main board
Yes
Check if the waterway flow is
consistent with requirements
No
Remove and adjust unit‟s inlet pipe.
Check if the water flow is sufficient
The engineering component fails.
Check the hydraulic device and
clean the filter
Yes
Check and repair the electromagnetic water
valve, electronic hot water valve and bushing
If the low pressure is rather low
Heat exchanger has scale. Please clean
the unit
No
Check if the expansion valve can
operate normally
Replace the expansion valve coil or even the valve
No
Yes
Check if the temperature difference before and
after unit‟s refrigerant filter is too large
There is a component with apparent temperature drop in the
system or the pipeline is blocked. Replace the related part
No
Yes
Yes
Filter is blocked. Replace the filter
No
No
No
No
Yes
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