TROUBLESHOOTING
FAULT AND ALERT MESSAGES
Troubleshooting procedures for the most common Fault and Alert messages are covered in this section. In the tables that follow the first column shows the Fault or Alert message as displayed by the UIM along with an explanation. The second column details things to check or repair and references test procedures detailed in the Operation and Service section (pages 10 - 47) of this manual.
DISPLAYED MESSAGE | CHECK/REPAIR | |
CONDITION/INDICATES | ||
| ||
|
| |
“No Current Detected” | • Ensure the power supply to the water heater | |
(Alert Condition) | matches the listed voltage on the water heater | |
| rating plate. Ensure there is not a dead leg of | |
The control system has not detected current in one | power on 3Ø models - see pages 12 - 14. | |
or more heating element circuits when expected. | • Check power circuit fuses - see page 17. | |
Possible Causes: | • Check heating elements see pages 20 - 26. | |
• Check contactors - see pages 29 - 33. | ||
Power supply problem (dead leg on 3 phase supply) | ||
• Check power circuit wiring to heating elements | ||
Blown power circuit fuses | ||
from Power Distribution Block, to fuse blocks, to | ||
Defective heating element(s) | ||
contactors, to heating elements - see wiring dia- | ||
Defective contactor(s) | ||
gram on water heater and Contactor Configura- | ||
Plug/socket connection problems | ||
tion illustration on page 30. Correct any mis | ||
Defective Element Sensor | ||
wiring. Repair or replace damaged wiring as | ||
Wiring connection problems | ||
necessary. | ||
| ||
| • Check the Element Sensor J12, J13, J14 plug/ | |
| socket connections at the CCB for wear or dam- | |
| age - see page 28. Ensure they are mating | |
| properly and providing good contact. See CCB | |
| illustration and socket identification on pages 42 | |
| - 44 for location. | |
| • Check Element Sensors - see pages 27 & 28. | |
| Replace any Element Sensors determined to be | |
| defective. | |
| • Call the toll free technical support phone num- | |
| ber on the back cover of this manual for further | |
| assistance if the problem has not been cor- | |
| rected after performing the procedures outlined | |
| here. | |
|
|
Servicing should only be performed by a Qualified Service Agent
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