Samsung MH052FDEA, Руководство по обслуживанию

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67 Samsung Electronics
Troubleshooting
6-3-3 Checking Indoor controller
1. 9K / 12K BTU (MH026FPEA / MH035FPEA) PCB
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.
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Measure voltage between CN43 pin 1 (+12V) and CN43 pin 2 (GND).
1.
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Normal voltage is between 11.5V and 12.5V.
2. 18K BTU (MH052FPEA) PCB
1. 1) Checking FUSE
1. 1) The fuse F701 is located on the inner side AC PCB.
1. 2) Checking DC Voltage
1. 1) Measure voltage between CN43 pin 1 (+12V) and CN43 pin 2 (GND) on the outer side PCB.
1. 1) Normal voltage is between 11.5V and 12.5V.
1. 1) DC voltage is supplied from CN90 on the inner AC PCB. Pin layout is as follows.
1. 1) Pin 7 : GND, Pin 8 : +5V, Pin 9 : +12V
6-3-4 Checking Power cable and Communication cable
See 6-2 "Checking and Testing operations" and installation manual.
6-3-5 Checking Temperature sensor
See 6-5 "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 Value Remark
8 Discharge sensor temperature
9 OLP sensor temperature
The unit is degree C
A Condenser sensor temperature
B Outdoor sensor temperature
DB98-20241A(2)_2 05/1/25 5:07 AM Page 67