Kaysun Zen On 2014, Service Manual

Page: 79 / 116

Electrical Control Function
Electrical Control 73
1. Electrical Control Function
1.1 Definition
T1: Indoor room temperature
T2: Coil temperature of evaporator
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
1.2 Main Protection
1.2.1 Time delay at restart for compressor.
1.2.2 Sensor protection at open circuit and breaking disconnection.
1.2.3 Phase check function
If the phase sequence is detected wrong or lack of 1 or 2 phase, the unit won’t start and there is error code
displayed on outdoor PCB.
1.2.4 Over-current protection
When compressor is running, if the current is over twice of the rated for 3 seconds, the compressor will stop
and an error code will be displayed on the outdoor PCB. If the current becomes normal, the indoor sends
signal to the outdoor, the outdoor will display normally.
1.2.5 Fan Speed is out of control
When Indoor fan speed keeps too low (less than 300RPM) for 50s, the unit will stop and the LED will display
the failure.