NDE Pool MASTER PLUS NDE-08-DCP - Page 24

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8.2 Other Malfunctions and Solutions (No display on LED wire controller)
Malfunction
s
Observation
Reasons
Solution
Heat pump
is
not running
LED wire
controller shows
no display
No power supply
Check whether cable and
circuit breaker are
connected
LED wire
controller
displays the actual
time
Heat pump under tandby
status
Startup heat pump to run.
LED wire
controller
displays the actual
water temperature
1. Water temperature is
reaching set value, heat
pump 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
temperatur
e is cooling
when heat
pump runs
under
heating
mode
LED wire
controller displays
actual water
temperature and
no error code
displays
1. Chose the wrong
mode
2. Figures show defects
3. Controller defect
1. Adjust the mode
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
260
AC Input over-
current
Input three phase imbalance
(three phase module is
effective)
Inspection input three
phase phase voltage
264
AC Input low
voltage
Input low voltage
Inspect input voltage
272
Compressor High
pressure failure
Compressor high pressure
failure (reserved)
288
IPM too high
temperature
Main unit fan motor failure, air
duct blocked
Inspect fan motor and
air duct
320
Compressor
peak current too
high
Compressor line current too
high, the driver program doesn’t
match with compressor
Replace inverter
module
384
PFC module
over-temperature
PFC Module too high
temperature