Mainboard; Compressor - Hisense HRF266N6CSE Service Manual

Mainboard

Check the Mainboard
IMPORTANT: If the problem is most likely caused
by a faulty mainboard, replace the mainboard first
to confirm.
NOTE: Replacement board settings are at factory
default. After replacing the mainboard, set all
temperatures to the customer's previous setting.
Remove the Mainboard
1. Unplug the refrigerator or disconnect power.
2. Using a Phillips screwdriver, remove the screws
fastening the electrical compartment cover to
the cabinet.
3. Remove the compartment cover.
4. Remove the screw, and then remove the
mainboard.

Compressor

Input Voltage/Frequency: 100-120V/60Hz
Input Power: ≤300W
The compressor takes low temperature and low
pressure gas from the evaporator and compresses
this gas to form high-temperature and high-
pressure gas. It then delivers the gas to the
condenser.
Check the Compressor
1. Plug in refrigerator. The compressor should
start within 1 minute.
2. Allow time for the evaporator fan to start.
3. If neither the compressor or evaporator fan
begin to operate check:
Voltage Readings on Mainboard
Remove the electrical compartment cover to
check mainboard.
Mainboard Wiring Connection
Check the wiring connection between the
compressor and the mainboard. If the connection
is loose, repair the connection.
Mainboard Voltage and Frequency
•
Use a multimeter to measure the voltage
between Label N and Label COMP on the CN2
(Pin No. 1 and Pin No. 5) connector of the
mainboard.
•
Then, measure the frequency of CN8 connector
(Pin No. 1 and Pin No. 2).
If the measured voltage is equal to the electric
supply power and there is stabilized frequency,
it means the compressor is faulty. If not, then the
mainboard is faulty. Replace the mainboard.
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