TROUBLESHOOTING
Continued
OBSERVED PROBLEM POSSIBLE CAUSE | REMEDY |
ODS/pilot lights but flame goes out when control knob is re- leased
1.Control knob not fully pressed in
2.Control knob not pressed in long enough
3.Safety interlock system has been triggered
4.Equipment shutoff valve not fully open
5.Pilot flame not touching thermocouple, which allows thermocouple to cool, causing pilot flame to go out. This problem could be caused by one or both of the following:
A)Low gas pressure
B)Dirty or partially clogged ODS/Pilot
6.Thermocouple connection loose at control valve
7.Thermocouple damaged
8.Control valve damaged
1.Press in control knob fully
2.After ODS/pilot lights, keep control knob pressed in for 30 seconds
3.Wait one minute for safety in- terlock system to reset. Repeat ignition operation
4.Fully open equipment shutoff valve
5.A) Contact local natural or propane/LP gas company
B)Clean ODS/pilot (see Cleaning and Maintenance, page 12) or replace ODS/ pilot assembly
6.Hand tighten until snug, then tighten 1/4 turn more
7.Replace pilot assembly
8.Replace control valve
Burner does not light after ODS/ | 1. Inlet gas pressure is too low | 1. | Contact local natural or | |
pilot is lit | 2. | Burner orifice(s) clogged |
| propane/LP gas company |
| 2. | Clean burner(s) (see Cleaning | ||
|
|
|
| and Maintenance, page 12) or |
|
|
|
| replace burner orifice(s) |
| 3. | Burner orifice(s) diameter | 3. | Replace burner orifice(s) |
|
| too small | 4. | Put remote selector in ON |
| 4. | Remote selector in OFF | ||
|
| position (Remote use only) |
| position |
| 5. | Wire disconnected from gas | 5. | See Wiring Diagram, page |
|
| control (Remote use only) |
| 17) |
|
|
|
| |
Delayed ignition of burner | 1. Manifold pressure is too | 1. | Contact local natural or | |
|
| low |
| propane/LP gas company |
| 2. | Burner orifice(s) clogged | 2. | Clean burner(s) (see Cleaning |
|
|
|
| and Maintenance, page 12) |
Burner backfiring during com- | 1. Burner orifice is clogged or | 1. | Clean burner (see Cleaning | |
bustion |
| damaged |
| and Maintenance, page 12) or |
|
|
|
| replace burner orifice |
| 2. | Damaged burner | 2. | Replace damaged burner |
| 3. | Gas regulator defective | 3. | Replace gas regulator |
14 | www.desatech.com |
