Samsung MH020FPEA Service Manual page 182

12-3-3 Checking Indoor controller
1. MH✳✳✳FPEA✳ /MH✳✳VP2-✳✳
1. 1) Checking FUSE
1. 1) This control PCB has 2 fuses, F701 and F702.
1. 1) If F702 is blown PCB circuit has some damage and replace PCB.
1. 2) Checking DC voltage
1. I
Measure voltage between CN32 pin 1 (+12V) and CN32 pin 2 (GND).
1. I
Normal voltage is between 11.5V and 12.5V.
12-3-4 Checking Power cable and Communication cable
See 12-2 "Checking and Testing operations" and installation manual.
12-3-5 Checking Temperature sensor
See 12-5 "Fault Diagnosis of Major Parts".
In case of a sensor in outdoor unit, temperature can be monitored with "VIEW MODE".
Press K4 key on the outdoor display PCB for several time to change the display to sensor temperature value.
Left 1 digit of the LED is data index and Right 2 digits are the value.
Index
8
9
A
B
Samsung Electronics
Discharge sensor temperature
OLP sensor temperature
Condenser sensor temperature
Outdoor sensor temperature
Value
Troubleshooting
Remark
The unit is degree C
12-9 12-9