80 PB
COMPONENTS TESTING
Outdoor Fan Motor
Resistance Test.
1. Disconnect the outdoor fan motor plug on the main PCB.
See Outdoor Unit - Main PCB ID for 9-12k units
See Outdoor Unit - Main PCB ID for 18k units
See Outdoor Unit - Main PCB ID for 24k units
U= Yellow V= Red W= White
3. Using an OHM Meter, check resistance from U to V, U to W, and V to to
W.
All of the readings should be within 1 ohms of each other.
A difference of more than 1 ohms indicates that windings may be damaged
and the motor should be replaced.
NOTE: Actual OHM values may vary due to temperature of the motor.
4. Using a MegOhm Meter, check the motor windings for a short to
ground.
Measure the resistance of each winding to ground.
A reading of less than 10 Megohms indicates that the motor windings may
be damaged and the motor should be replaced..
Figure
5. DC Voltage test
Manually rotate indoor fan motor slowly for several revolutions, and
measure voltage “YELLOW” and “GND” on motor. The voltage repeats 0V
DC and 5V DC.
Notes:
• Do not hold motor by lead wires.
• Do not connect or disconnect the molex connecter while power ON.
• Do not drop motor against hard material. Malfunction may not be
observed at early stage after such shock. But it may be found later,
this type of mishandling voids our warranty.
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment with
power applied.
Failure to do so could result in serious injury or
death.
To Next Page
Loading...
