Table 2-2. Unit Troubleshooting
TEST OR INSPECTION
Before you use this table, be sure you have performed all applicable preventive
maintenance checks and services.
WATER HEATER FAILS TO START.
Remove rings, bracelets, wristwatches, and neck chains before working around or
on the laundry unit. Jewelry can catch on equipment and cause injury, or may
short across an electrical circuit and cause severe burns or electrical shock.
Use extreme caution when performing the following test with power ON to avoid
injury from electrical shock.
Use ac voltmeter and check for 208 V ac incoming voltage to water heater control box. Measure
voltage between any two legs on the red (R), black (BK), or blue (BL) wires behind load limit
switch. Refer to water heater wiring diagram (Appendix E, Figure 5).
If voltage is low or not present, check generator set for proper function. Refer to TM
If voltage is 208 5 V ac, proceed to next step.