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8.2 Other Malfunctions and Solutions (No display on LED wire controller)
Malfunctions
Observing
Reasons
Solution
Heat pump is
not running
LED wire controller
no display.
No power supply
Check cable and circuit
breaker if it is connected
LED wire controller.
displays the actual time.
Heat pump under standby
status
Startup heat pump to run.
LED wire controller
displays the actual
water temperature.
1. Water temperature is
reaching to setting value, HP
under constant temperature
status.
2. Heat pump just starts to run.
3. Under defrosting.
1. Verify water
temperature setting.
2. Startup heat pump
after a few minutes.
3. LED wire controller
should display
"Defrosting".
Water
temperature
is cooling
when HP runs
under heating
mode
LED wire controller
displays actual water
temperature and no error
code displays.
1. Choose the wrong mode.
2. Figures show defects.
3. Controller defect.
1. Adjust the mode to
proper running
2. Replace the defect
LED wire controller, and
then check the status
after changing the
running mode, verifying
the water inlet and outlet
temperature.
3. Replace or repair the
heat pump unit
Short running
LED displays actual water
temperature, no error code
displays.
1. Fan NO running.
2. Air ventilation is not enough.
3. Refrigerant is not enough.
1. Check the cable
connections between the
motor and fan, if
necessary, it should be
replaced.
2. Check the location of
heat pump unit, and
eliminate all obstacles to
make good air
ventilation.
3 Replace or repair the
heat pump unit.
water stains
Water stains on heat pump
unit.
1. Concreting.
2. Water leakage.
1. No action.
2. Check the titanium
heat exchanger carefully
if it is any defect.
Too much ice
on evaporator
Too much ice on
evaporator.
1. Check the location of
heat pump unit, and
eliminate all obstacles to
make good air
ventilation.
2. Replace or repair the
heat pump unit.
34


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