8
-3-
3
. Only outdoor fan does not run.
8
-3-
4
. Only compressor does not run.
NO
YES
YES
YES
• Measure coil resistance of
starting relay.
• Measure resistance of
compressor motor winding.
• Check capacitors.
• Either overload relay or
internal protector is working.
YES
• Temperature of compressor
is abnormally high.
Refrigerant gas shortage.
Charge refrigerant gas (R22).
Rotor may be locked up.
• Measure coil resistance of
power relay. (PR)
Fan cannot
be turned.
OK
• Check fan rotation.
Turn fan gently once or twice by
hand.
• Check fan casing
foreign matter on
inside.
Fan motor burnout
or foreign matter in
bearings.
Remove foreign
matter or repair.
Repair or replace.
• Measure resistance of outdoor fan
motor winding.
• Check fan motor capacitor.
38
Summary of Contents for GR451R
Page 13: ...4 REFRIGERANT FLOW DIAGRAM 10...
