Carrier TRANSICOLD VECTOR 8100 Operation & Service Manual Download

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62-11785

7–74

06000

CONDENSER MOTOR2 OVERHEATED

• ACTIVATION: The condenser fan motor Internal Protectors (IP-CDM2) circuit is open.

• 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:

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.

Determine if the IP is Open

a. Check for Continuity between 1CCB3 and 1CCB20. 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 7 below.

Check Fuses

- Check F9, F36, F37 and F38. Verify correct fuse and check fuse holder for damage, see

Figure 2.3

Figure 2.4

. Replace fuse(s) as required. Clear alarms, restart and check for repeat alarm(s).

Check Condenser Fan Motor Contactor

a. Inspect the wire connections to the contactor. (See wiring schematic

Section 10.3

.) 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.

Perform Pretrip

- Clear Active Alarm list, then run Pretrip & check for any new alarms. Any active alarms

must be corrected and cleared before proceeding.

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. If closed, then an intermittent IP circuit is suspect. Check phase-to-phase and
phase to ground for short or open circuits. Refer to

Section 2.9

for correct electrical values. If motor tests

good, check the DC IP circuit to microprocessor.

Check IPC circuit

a. Use Component Test Mode to energize CDCON2 circuit. (Refer to

Section 5.2.4

.) Output will

come on.

b. Verify 12 VDC at Pin A of CDCON2. 12 VDC indicates that the IP is closed.

c. Unplug the connector to condenser fan motor (CDM2) and check voltage on pins 4-5 in the

harness connector to ground. Check voltage at pin 5, should read 3 VDC. No voltage indicates an
open from pin 5 to 1CCB20. Check voltage at pin 4, should read 12VDC. No voltage indicates
open from pin 4 to 1CCB03.

d. Test continuity through CDM2 IP at pins 4-5 in the fan motor harness connector. Should be 0

Ohms. If condenser fan motor is extremely warm, allow it to cool off, then recheck IP continuity.

Check Motor Operation

- Turn the unit ON. Check current on each phase (must be less than shown on

Section 2.9

.) Check voltage on each phase (must be within voltage limits shown in

Section 2.9