Other Malfunctions And Solutions (No Display On Led Wire Controller) - GRE 777590 Manual De Instrucciones

8.2 Other Malfunctions and Solutions (No display on LED wire controller)

Malfunctions Observing
LED wire controller
no display.
LED wire controller.
displays the actual time.
Heat pump is
not running
LED wire controller
displays the actual
water temperature.
Water
LED wire controller
temperature is
displays actual water
cooling when
temperature and no error
HP runs under
code displays.
heating mode
LED displays actual water
Short running temperature, no error code
displays.
Water stains on heat pump
water stains
unit.
Too much ice Too much ice on
on evaporator evaporator.
Reasons
No power supply
Heat pump under standby
status
1. Water temperature is
reaching to setting value,
HP under constant
temperature status.
2. Heat pump just starts to
run.
3. Under defrosting.
1. Choose the wrong mode.
2. Figures show defects.
3. Controller defect.
1. Fan NO running.
2. Air ventilation is not
enough.
3. Refrigerant is not
enough.
1. Concreting.
2. Water leakage.
- 32 -
Solution
Check cable and circuit
breaker if it is connected
Startup heat pump to run.
1. Verify water temperature
setting.
2. Startup heat pump after a
few minutes.
3. LED wire controller should
display "Defrosting".
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
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.
1. No action.
2. Check the titanium heat
exchanger carefully if it is any
defect.
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.