18
/
22
D7 off——switch on “off” position
。
2) D8 blue led
：
water level indicator
D8 flash slow——1s on 1s off
，
E3
，
water lack protection.
D8 Illuminate——water probe touch the water
D8 off——water probe not touch the water
3) D9 red led
：
Harvest cycle indicator/ harvest probe
D9 flash fast——0.3s on 0.3s off
，
E1
，
long freeze protection
D9 flash slow——0.7s on 0.7s off, E2
，
long harvest protection
D9 Illuminate——harvest probe not touch the water
D9 off——harvest probe touch the water
4) D10 yellow led
：
water curtain switch indicator
D10 flash fast——0.3s on 0.3s off
，
E4, HP protection
D10 flash slow——1s on 1s off
，
E5, NTC temperature alarm
D10 Illuminate——water curtain switch close
D10 off——water curtain switch open
4.
Failures analysis
1) Long freeze cycle
：
a) High ambient temperature , high water inlet temperature;
b) Dirty condenser, clean the condenser
c) Harvest probe issue (short circuit)
d) Refrigeration system failure, call service call
2) Long harvest cycle
：
a) Too thick for ice thickness
；
adjust the water probe
b) Dirty for evaporator, clean;
c) Ambient temperature is too low
；
d) NTC probe issues
3) HP protection
：
a) Dirty of condenser, clean;
b) Ambient temp. too higher;
c) HP switch is wrong, open; Fan motor issue, not run;
d) Refrigeration system failure, call service call;
4) Water lack protection
：
a) No water supply
b) Water ball valve is closed
c) Water leak of the trough from somewhere
d) Water inlet valve issues
e) Water probe issues (short circuit)
