9-1
CHECKING FLOW CHART BY FAILURE
Symptom
Check Point
1. Power Failure
(Dead)
2. No Display
1. Check Electrical Wiring
2. Check the SMPS PCB Input Voltage with CN01
Main PCB
CN03
CN02
SMPS PCB
CN01
Thermostat
WH
RD
Pin No.
1-3
4-7
6-7
Vf(4.3V)
-33V
12V
Voltage
CN01
CN02
CN03