7–49
62-11640
00100
OVERLOAD/GROUND FAULT
• ACTIVATION: Engine or Electric Operation is being called for and the overload ground fault module is
reading more than 40 Amps on any A/C current leg OR there is A/C voltage leaking to ground of more
than 150 Milli
−
amps.
• UNIT CONTROL: Engine Operation: Engine and unit shutdown and alarm.
Electric Operation: Refrigeration system shutdown and alarm.
• RESET CONDITION: Auto Reset in Engine Operation. Alarm may be manually reset via Keypad or,
alarm may be reset 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 Overload Ground Fault Detector (OGF) LED
Check status LED.
If LED is On - Ground Fault is detected. Start with Step 3 below.
If LED is Off - Circuit Overload is detected. Start with Step 2 below. Refer to
2.
Check For Electrical Overload
Check high voltage amp draw from GENCON if running in Engine Operation or PSCON2 if running in
Electric Operation. Must be less than 40 Amps.
3.
Check For High Voltage Short To Ground
a. Check resistance between T1, T2 and T3 for ALL High voltage contactors to ground. Reading
must be greater than 25,000 Ohms.
b. Perform Meg
−
ohmmeter test on all high voltage circuits. See
4.
Perform Pretrip Check
a. Clear Active Alarm list, then run Pretrip & check for any new alarms. Note during which test Alarm
00100 occurs.
b. Further test circuit from Step a. above. Use a meg
−
ohmmeter to test.
5.
Check Overload / Ground Fault Device
With the engine OFF and standby power disconnected, start the unit in Engine Operation. Must have
12 VDC at 2CCB12. Refer to
Summary of Contents for Vector 8500
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