Checkpoints For Each Component And Check Procedure - Sanyo SAP-KMV91G-S Technical & Service Manual

11-4. Checkpoints for Each Component and Check Procedure

11-4-1. Indoor Controller (control section)
Check for any problems such as disconnections or contact faults in the display board connector.
Also check for disconnections or contact faults at all other terminals.
11-4-2. Indoor Fan Motor
< SAP-KMV91G and SAP-KMV181G >
Check for disconnections or contact faults at the connector for the indoor fan.
If fan rotates easily
the fan motor is in
normal condition.
Check defective connection of
the connector for control board.
Check for disconnection of
fan motor winding.
11-4-3. Sensors
Remove the sensors from the board to check for disconnections or short-circuits.
A faulty sensor can be judged by using the self-diagnosis function or by referring to thermistor characteristics.
11-4-4. Inter-unit Wiring
Check that all wiring is connected properly to the terminal plate, and each wire is connected to the corre-
sponding position.
Check whether the wiring may be inadvertently connected to each other somewhere in the middle.
11-4-5. Switchboard
Check for continuity at the ON, OFF TEST, and DEMO switches with a tester.
11-4-6. Indoor / Outdoor Control Board
Check for disconnections or connection faults.
CAUTION
11-4-7. Electrolytic Capacitor
Remove terminal from electrolytic capacitor and discharge electricity sufficiently before checking with testers.
Set the multimeter to resistance range. The capacitor is good if the pointer bounces momentary.
Check if there is swelling or distortion in the casing.
Gently rotate fan by
hand a few times.
Check contact faults of
leads and connectors.
Measure resistance between
any 2 pins. An open circuit
between any pair of pins
indicates a defective fan
motor.
Do not insert or remove the connector for the outdoor control board while the
power is on. (This will damage the controller.)
Tester range
Tester range
Fan will not
rotate at all.
Foreign matter or a projection on
fan casing is preventing
fan from rotating.
Remove the problem.
Fan motor coil is burnt or
foreign matter has gotten into
bearings of fan motor.
Replace or repair fan motor.
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Tester range
Tester range