Troubleshooting
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||||
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Electronic Ignition Models Only | 1. No gas supply, or shutoff | 1. | Check to see if you have gas | |||
Ignitor will not spark or pilot will |
| valve is OFF |
| supply and that equipment | ||
not light | 2. | Air in gas line | 2. | shutoff valve is opened | ||
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| Repeat lighting procedure | ||||
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| several times to purge all air | |
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| out of lines. If after repeated | |
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| attempts appliance does not | |
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| light, call for qualified service | |
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| 3. | Construction debris clogging | 3. | and repair | |
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| Remove debris and dirt, and | ||||
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| pilot orifice |
| inspect and clean any other | |
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| 4. | Low gas pressure | 4. | possible obstructions | |
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| Contact your gas supplier to | ||||
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| 5. | Kinked pilot line | 5. | check pressure | |
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| Have a qualified technician | ||||
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| 6. | Control valve is not opening | 6. | replace pilot line | |
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| Replace control valve (Refer to | ||||
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| 7. | No power to unit or the igni- | 7. | Replacement Parts, page 34) | |
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| Check that main power is on | ||||
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| tion module |
| and that wire connections are | |
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| made correctly to the ignition | |
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| model (see Wiring Diagrams, | |
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| page 13). Check for 24 VAC | |
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| at the secondary side of the | |
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| transformer. If 24 VAC is | |
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| present, and the module does | |
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| not operate, have the module | |
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| replaced otherwise have the | |
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| transformer replaced | |
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Electronic Ignition Models Only | 1. Loose wiring on ignitor wire | 1. | Check wiring connection. Refer | |||
Pilot will not stay lit |
| to ignition module and/or poor |
| to wiring diagram (see Wiring | ||
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| ground to ignition module |
| Diagrams, page 13) and/or | |
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| check ground wire to ignition | |
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| 2. Pilot flame too low to sense | 2. | module | ||
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| Clean and adjust pilot burner | ||||
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| and check gas supply and inlet | |
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| pressure to unit. Note: Have a | |
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| qualified technician replace pilot | |
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| assembly if broken or corroded | |
Electronic Ignition Models Only | 1. Pilot flame may be too low to | 1. | Clean and adjust pilot flame | |||
Frequent outage of main burner |
| sense flame causing ignition |
| for maximum flame across | ||
and pilot after complete ignition |
| module to shut down | 2. | sensor rod | ||
sequence | 2. Improper or restricted venting | Locate and correct all vent | ||||
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| conditions (see Checking for | |
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| Proper Venting, page 10) | |
28 | www.desatech.com |
