27
Issue 200906
Rev. Ref0906S012V0
2) Measure the resistance of the heating wire with a multimeter. It should be around 345.
3) Measure the resistance of the defrosting fuse. If it is zero, the fuse is OK. If it is infinite, the fuse is
malfunctioning.
4) If no malfunction is found in the above checks, please test the defrosting temperature sensor with a
multimeter.
8-1-4 Symptom: neither displaying nor starting when powering on
Check:
1) Check if the power supply is connected properly.
2) Remove the main control panel and examine its back side carefully to see if there are solder skips
or open soldering;
3) Check if the connector of the freezer door hinge is connected properly.
4) Verify the display panel to see if the refrigerator is in OFF state. If so, press and hold the button on
the power board for 3s to turn it on.
Solutions:
1) If there is dry soldering or open soldering on the control panel, resolder it with an electrical iron.
2) If any connector is not connected properly, replug it firmly.
3) Press and hold the button on the power board for 3s to turn the refrigerator on.
8-1-5 Symptom: poor freezing effect accompanied by loud noise
Check:
1) Check if there is apparent abnormal sound in the freezer storage compartment. Remove the fan
cover plate, close the refrigeration air door (and the icemaker air door), and check if the freezer fan
is operating normally. (The fan does not operate when the refrigeration air door is open. Please first
eliminate the possibility of improper installation of the door on-off)
2) If the freezer fan does not run, remove it and check if its connector and the cabinet connector are
connected properly. Test if there is approximately 12VDC voltage across pin2 and pin 3 of CN4. If
there is no 12VDC voltage, the main control panel can generally be determined to be
malfunctioning. If there is 12VDC voltage, the freezer fan can generally be determined to be
malfunctioning.
3) If the fan rotates abnormally, the fan is malfunctioning.
Solutions:
(1)If there is apparent abnormal sound in the freezer storage compartment, check if the fan base is
firmly fixed, if the fan vanes are installed properly, and if they intervene with the wires. If any of these
problems is found, please remove the fan and reinstall it properly.
(2)If the fan connector is not installed properly, disconnect the terminals and reinstall the connector
DŽ
(3)If the main control panel or the fan is malfunctioning, replace the malfunctioning one with a good
spare part.
SERVICE MANUAL
Model:
HRF-663
ISB2R/B/W
