A3).
7.2 Defrost
1) d4=0, defrost is forbidden
2) d4=1:
1. When evaporator sensor is enabled (d1=1), evaporator sensor temperature is higher than defrost
termination temperature (d8), defrost could not be started.
2. When evaporator sensor is enabled (d1=1), evaporator sensor temperature is lower than defrost
termination temperature (d8), or evaporator sensor is disabled (d1=0), defrost could be started if any of
the condition below is met:
a. When defrost cycle d4) finishes running, start defrosting
b. Hold and press key for three seconds, start defrosting.
3) Under defrost status, if any of the condition below is met, defrost could be closed:
1. When evaporator sensor is enabled (d1=1), evaporator sensor temperature is higher than defrost
termination temperature (d8), defrost is closed.
2. Max. defrost time (d7) finishes running, defrost is closed.
3. Hold and press key for three seconds, close defrost.
4) U3=00, K2 relay works as defrost relay output, and defrost method is electrical heating defrost.
U3=01, at this time, no defrost relay and defrost method is off-cycle defrost.
7.3 Lighting:
U3=01: K2 relay works as lighting relay, press ▲ to open the lighting and press ▲ key again to
close the lighting.
7.4 Alarm reminding
When the cabinet temperature sensor failure, display E1 in digital tube;
When the evaporator sensor failure, display E2 in digital tube.
When the buzzer output selection 9A4) is 1, if the controller occurs alarm, the buzzer beeps; and
when all alarm is relieved, buzzer mutes, or you could press any time to mute it. If new alarm occurs
after relieving all alarm, buzzer will beep again.
8. Wiring notice
ACN,ACL power supply, J2,J3 compressor output, J2,J4 defrost output; J6 cabinet
temperature sensor, J5 evaporator sensor; the ends of connection cable is separately
connected to power supply board J7 and display panel J8.
9. Safety rules:
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