Mustang 24, User And Service Manual

Page: 21 / 26

- 19 -
8.2 Other Malfunctions and Solutions (no display on LED controller)
Malfunctions Observing Reasons Solution
Heat pump is
not running/
compressor is
on but fan is off
LED controller shows
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. Chosen the wrong mode.
2. Figures show defects.
3. Controller defect.
1. Adjust the mode to
proper running mode.
2. Replace the defect LED
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 NOT 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 for any
leaks.
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.