ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL
FAULT MESSAGES (CONT)
DISPLAYED MESSAGE | CHECK/REPAIR | |
CONDITION/INDICATES | ||
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“Blower Prover Open” | PERFORM ALL THESE TESTS WITH POWER | |
(Blower Not Running) | TURNED ON AND A CALL FOR HEAT ACTIVE. | |
The control system has detected open contacts at | • Check for 120 VAC at the CCB’s J2 Socket | |
(page 36) pins 1 & 2. Perform close visual | ||
the Blower Prover air pressure switch after Blower | inspection of the pins inside the plug and socket | |
has been energized. | - ensure plugs and sockets are mating properly | |
| and providing good contact. | |
| • Check all wiring between CCB’s J2 Socket pins | |
| 1 & 2 and the blower motor assembly’s high | |
| voltage 3 Pin Socket (see page 10). | |
| • Disconnect the plug at the blower motor assem- | |
| bly’s high voltage 3 Pin Socket - check for 120 | |
| VAC at the plug end. | |
| • Perform close visual inspection of the pins | |
| inside the plug and socket at the blower motor | |
| assembly’s high voltage 3 Pin Socket - ensure | |
| plugs and sockets are mating properly and pro- | |
| viding good contact. | |
| • Disconnect the plug at the blower assembly’s | |
| Low Voltage PWM 5 pin plug (see page 10). If | |
| the Blower has not been running prior and starts | |
| running when this plug is disconnected - call the | |
| technical support phone number shown on the | |
| water heater labeling for further assistance. | |
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“Blower Prover Open” | • Ensure the Blower Prover air pressure switch | |
(Blower Is Running) | sensing tube is connected properly at both ends | |
The control system has detected open contacts at | and that it is not kinked or damaged. Repair/ | |
the Blower Prover air pressure switch after Blower | replace anything worn or damaged as neces- | |
has been energized. | sary. | |
| • Check all wiring between CCB’s J6 Socket | |
| (page 35) pins 6 & 7 and the Blower Prover air | |
| pressure switch. Repair/replace anything worn | |
| or damaged as necessary. | |
| • Perform close visual inspection of the pins | |
| inside the CCB J6 plug and socket - ensure | |
| plugs and sockets are mating properly and pro- | |
| viding good contact. | |
| • Review the air pressure switch information | |
| beginning on page 18. Perform the pressure | |
| switch test procedure for the Blower Prover air | |
| pressure switch - see pages 21 through 23. | |
| Replace the Blower Prover switch if defective. | |
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Technical Literature Department | 48 of 52 | Ashland City, TN © 2008 |
Servicing should only be performed by a Qualified Service Agent |
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