110,000 Btu/Hr H.S.I. Series
PORTABLE FORCED AIR HEATER
TROUBLESHOOTING
Note: For additional help, visit DESA International’s Technical Service web site at www.desatech.com.
WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur.
OBSERVED FAULT | POSSIBLE CAUSE | REMEDY | ||||
Motor does not start five seconds after heater | 1. | No power to heater | 1. | Check circuit breaker in electrical panel. | ||
is plugged in | 2. | Thermostat setting too low | 2. | Turn thermostat knob to a higher setting | ||
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| WARNING: High voltage! |
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| 3. | Bad electrical connection between mo- | 3. | Check all electrical connections. See | ||
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| tor and ignition control assembly or ig- |
| Wiring Diagram, page 11 | ||
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| nition control assembly and power cord |
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| 4. | Blown fuse on ignition control assembly | 4. | See Ignition Control Assembly, page 10 | ||
| 5. | Binding pump rotor | 5. | If fan does not turn freely, see Pump | ||
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| Rotor, page 10 | |
| 6. | Defective ignition control assembly | 6. | Replace ignition control assembly | ||
| 7. | Defective motor | 7. | Replace motor | ||
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Motor starts and runs but heater does not | 1. | No fuel in tank | 1. | Fill tank with kerosene | ||
ignite | 2. | Pump pressure incorrect | 2. | See Pump Pressure Adjustment, page 7 | ||
| 3. | Dirty fuel filter | 3. | See Fuel Filter, page 8 | ||
| 4. | Obstruction in nozzle assembly | 4. | See Nozzle Assembly, page 9 | ||
| 5. | Water in fuel tank | 5. | Drain and flush fuel tank with clean kero- | ||
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| sene. See Storing, Transporting, or Ship- | |
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| ping, page 5 | |
WARNING: High voltage!
6.Bad electrical connection between igni- tor and ignition control assembly
7.Defective ignitor
8.Defective ignition control assembly
6.Check electrical connections. See Wir- ing Diagram, page 11
7.Replace ignitor, see page 8
8.Replace ignition control assembly
Heater ignites but ignition control assembly | 1. | Pump pressure incorrect | 1. | See Pump Pressure Adjustment, page 7 |
shuts heater off after a short period of time | 2. | Dirty air intake, air output, and/or lint | 2. | See Air Output, Air Intake, and Lint Fil- |
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| filter |
| ters, page 7 |
| 3. | Dirty fuel filter | 3. | See Fuel Filter, page 8 |
| 4. | Obstruction in nozzle assembly | 4. | See Nozzle Assembly, page 9 |
| 5. | Photocell assembly not properly installed | 5. | Make sure photocell boot is properly |
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| (not seeing the flame) |
| seated in bracket |
WARNING: High voltage!
6.Dirty photocell lens
7.Bad electrical connection between pho- tocell and ignition control assembly
8.Defective photocell
9.Defective ignition control assembly
6.Clean photocell lens
7.Check electrical connections. See Wir- ing Diagram, page 11
8.Replace photocell
9.Replace ignition control assembly
www.desatech.com
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