Check Compressor Contact Circuit
refrigeration
Description
CCON contactor coil circuit is outside the normal 0.0 to 1.0 Amps (12 VDC) draw; pretrip fails and shows “PRETRIP FAIL AND COMPLETED”.
Activation Conditions
Normal draw for the CCON contactor coil is 0.0 to 1.0 Amps (12 VDC). The circuit tests outside this range.
Unit Behavior
Engine and Electric Operation: Pretrip will fail and display “PRETRIP FAIL AND COMPLETED”.
Reset Conditions
Auto Reset if Pretrip is started again, or alarm may be manually reset via keypad or by turning the unit off, then back on again.
Corrective Actions
1. Check CCON a. Inspect CCON contactor coils and wire connections. Verify there is no damage to coil, and no damage, moisture, or corrosion in connections. b. Check contactor coil resistance Refer to Section 2.11. 2. Check CCON Amp Draw a. Check CCON contactor coil amp draw. Use Component Test mode (Section 5.2.4) to test. Refer to Section 2.11 for correct electrical values. View current draw in Component Test mode screen. b. Listen for CCON to pull in. If CCON contactor pulls in, CCON is OK. If CCON contactor does not pull in, check for 12 VDC at CCON coil. 12 VDC indicates defective CCON coil. 3. Check CCON Wiring - Inspect harness and control box connector pins and terminals CCB-1 to CCON- A1 and CCON-A2 to ground. (See wiring schematic Section 10.2) Verify there is no physical damage to harness, and no damage, moisture, or corrosion in connectors.