17
Faults
Remark
Reason Solution
IPM module output circuit temperature
sensor failure
EE14 The sensor output is abnormal Check the instrument panel or replace
Protection against excessively high IPM
module temperatures
EE15 Check the instrument panel or replace
Protection of PFC module EE16 Check the instrument panel or replace
DC fan error EE17 Check the instrument panel or replace
IPM module input circuit temperature sensor
failure
EE18 Check the instrument panel or replace
Protection against excessively high PFC
module temperatures
EE19 Check the instrument panel or replace
Electrical power failure EE20 The supply voltage is too variable Check the instrument panel or replace
Software check error EE21 The compressor runs outside of preset steps Check the instrument panel or replace
Current detection circuit fault EE22 Abnormal amplification of the output voltage Check the instrument panel or replace
Compressor switch fault EE23 Check the instrument panel or replace
Ambient temperature thermometer control
unit failure
EE24
Compressor phase error EE25
1. Badly connected wiring,
2. Connection of one or two phases
Monitor the controller
Defrosting symbol, heater check is lit
Defrosting of glass
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 con-
stant 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 ob-
stacles to make good air venti-
lation.
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 ob-
stacles to make good air venti-
lation.
2. Replace or repair the heat
pump unit.
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