C2 Check Heater 1 Circuit
electrical
Description
Compartment 2 heater 1 circuit is not as specified, and pretrip fails with “PRETRIP FAIL AND COM- PLETED”.
Activation Conditions
See manual.
Unit Behavior
Engine and Electric Operation: Pretrip will fail and display “PRETRIP FAIL AND COM- PLETED”.
Reset Conditions
Auto reset if Pretrip is started again or alarm may be manually reset using the display mounted keys or by turning the unit off then back on again.
Corrective Actions
1. Determine in which test this alarm occurred 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 six seconds. d. Review active alarm list for Alarm 187. If alarm is present, follow step 2. If alarm is not present, follow steps 3 - 7. 12 VDC CIRCUIT: 2. Check 2HTCON1 Refer to Alarm 00103 Check 2HTCON1 Coil. 3. Check Evaporator High Temperature Switch(es) (HTA/HTB) Refer to Section 2.5 and Alarm 05022 C2 Check High Temperature Thermostat 460 VAC CIRCUIT: 4. Check Amp Draw of 2HTCON1 Heater Circuit a. Verify correct fuse, check fuse holder for damage, see Figure 2.6. Replace fuse as required. Clear alarms, restart and check for repeat alarm(s). b. With the unit running and calling for Heat, use a clamp-on ammeter to check the current draw of all three legs. Must be within range shown in Section 2.11 for all three legs. c. Check voltage at 2HTCON1 contacts. Must be within range shown in Section 2.11 for L1-L2, L1- L3, and L2-L3. Must be within range shown in Section 2.11 for T1-T2, T1-T3, and T2-T3. d. Shut down Unit. Verify continuity from 2HTCON1 to host. 5. Check Heater Elements a. Check heater elements with the unit Off. Verify no visual physical damage. Remove and replace if damaged. b. Check heater element resistance. Check from “T” terminals on 2HTCON1 contactor. See Section 2.11 for correct resistance. Alarm continued on next page...