Check Evaporator Fan Motor
refrigeration
Description
Evaporator fan motor has a fault; pretrip fails and shows “PRETRIP FAIL AND COMPLETED”.
Activation Conditions
See manual.
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
12 VDC Circuit 1. Determine Which Test This Alarm Occurred In a. Review active alarm list. Make a note of all alarms. b. Clear active alarm list. c. Restart and monitor Pretrip. Stop Pretrip during Test #3 by holding = key for 6 seconds. d. Review active alarm list for alarm P00189 Check Evaporator Fan Motor. If alarm is present, follow steps 2 through 4. If alarm is not present, follow steps 5 through 8. 2. Check 1EVCON a. Inspect Evaporator Fan Motor contactor coil and wire connections. Verify there is no damage to coil. Wire connections to contactor coil are tight. No damaged or corroded wires to contactor coil. b. Check contactor coil resistance. Refer to Section 2.11. 3. Check 1EVCON Amp Draw - Check 1EVCON 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. 4. Check 1EVCON Wiring - Inspect harness and control box connector pins and terminals PM-6 to 1EVCON-A1 and 1EVCON-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. Alarm continued on next page...