62-11785
7–26
00076
CONDENSER MOTOR OVERHEATED
• ACTIVATION: The condenser fan motor Internal Protectors (IP-CDM1) circuit is open
and
is not active.
• UNIT CONTROL: Refrigeration system shutdown and alarm with PSCON still energized.
• RESET CONDITION: Auto Reset when motor overload input is within limits or alarm may be manually
reset via keypad or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1.
Check Condenser Fan Blades for Free Operation
- Visually inspect condenser fan blades for any for-
eign material or damage or anything that will prevent the blade and motor from turning freely. Fan blade
must be in good condition. No sticks or other material obstructing it’s movement. No ice build-up prevent-
ing blade rotation.
2.
Determine if the IP is open
a. Check for Continuity between 1CCB33 and 1CCB02. It should be 0 Ohms. If condenser fan motor
is extremely warm, allow it to cool off, then recheck IP continuity.
b. If open, continue with step 6 below.
3.
Check Fuses
- Check fuses F9, F36, F37 and F38. Verify correct fuse and check fuse holder for dam-
age; see
and
. Replace fuse(s) as required. Clear alarms, restart and check for
repeat alarm(s).
4.
Check Condenser Fan Motor Contactor
a. Inspect the wire connections to the contactor. (See wiring schematic
.) No signs of
overheating of the contactor. Wiring is routed correctly to the contactor.
b. Check tightness of the contactor wire connections. Tighten with screwdriver and check for
discoloration of wires.
5.
Perform Pretrip
- Clear Active Alarm list, then run Pretrip & check for any new alarms. Any active alarms
must be corrected and cleared before proceeding.
6.
Check Condenser Fan Motors
- Disconnect power plug at motor. Test IP circuit for continuity using
ohmmeter. If IP remains open after a 30 minute cool down period, and motor feels cool to the touch,
remove and replace motor. Refer to
.
• If closed, then an intermittent IP circuit is suspect. Check phase-to-phase and phase-to-ground for
short or open circuits. Refer to
for correct electrical values.
• If motor tests good, check the DC IP circuit to microprocessor.
Alarm continued on next page...
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