® VGL450 Series
VENTED TYPE DECORATIVE APPLIANCE
TROUBLESHOOTING
Note: For additional help, visit DESA International’s Technical Service web site at www.desatech.com.
Note: Before troubleshooting the system, make sure the gas
The two most common causes of a malfunctioning gas appliance are:
1.Loose wiring connections
2.Construction debris clogging the pilot and/or gas control valve filter
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
Cannot light pilot | 1. | No gas supply, or | 1. | Check to see if you have gas supply |
| 2. | Air in gas line | 2. | Hold regulator control valve in the PILOT |
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| position for 3 to 4 minutes to purge air |
| 3. | Construction debris clogging pilot orifice | 3. | Remove debris and dirt, inspect and |
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| clean any other possible obstructions |
| 4. | Low gas pressure | 4. | Contact your gas supplier |
| 5. | Control valve knob is not on the PILOT | 5. | Refer to section on pilot lighting |
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| position |
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| 6. | Kinked pilot line | 6. | Have a qualified technician replace pi- |
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| lot line |
| 7. | Bad valve | 7. | Replace regulator valve (see Accessories |
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| & Replacement Parts, page 14) |
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Pilot will not stay lit | 1. | Loose wiring on thermopile to regula- | 1. | Check wiring connections. Refer to wir- |
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| tor valve. No millivolt current is being |
| ing diagram shown in Wall Switch In- |
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| sent back to regulator |
| stallation, page 6 |
| 2. | If valve knob and wall switch are in the | 2. | Have a qualified technician replace valve |
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| ON position, probable defective regula- |
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| tor valve |
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No gas to burner, although wall switch and | 1. | Wall switch wires defective or too long | 1. | Check electrical connections |
valve are set to the ON position | 2. | Pilot not generating sufficient | 2. | See Pilot will not stay lit, above |
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| millivoltage |
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Frequent pilot outage | 1. Pilot flame may be too low, causing |
| safety pilot to “drop out” |
1.Clean and adjust pilot flame for maximum flame impingement on pilot generator
Pilot goes out when wall switch is ON | 1. Millivolt output on thermopile too high | 1. Replace thermopile |
www.desatech.com
12 | 105704 |
