Paloma PH2-20R DVSN, Engineering Handbook

Page: 10 / 172

10 | Page SVC 820 Tankless Gas Trouble Shooting Manual
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Maintenance:
Decrease Of Ventilation
Amount (Blower Motor)
Clean any blockage in venting, Blower Motor, air intake
If maintenance requirements are met:
1. Check Blower Motor
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Installation/Gas supply:
Ignition Failure
1. Ensure you have gas to the appliance and valves are turned ‘ON’
2. Ensure gas type, gas pressure, and gas volume are correct
3. Bleed all air from gas lines
4. Ensure gas line, meter, and regulator are sized properly
5. Ensure appliance is properly grounded
If installation/gas supply requirements are met:
1. Check Gas Control valve for open or short circuits
2. Ensure Igniter Rod is operational
3. Check igniter/Flame Rod(s) and Igniter/Flame Rod(s) wiring harness for
damage
4. Check Control Board
5. Check Flame Rod Status
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Gas supply/Installation/
Maintenance:
Flame Failure (Had Main
Burner, Then Lost It)
1. Ensure gas type and pressure is correct
2. Bleed all air from gas lines
3. Ensure Flame Rod wire(s) is connected
4. Check Flame Rod(s) for carbon build-up
5. Ensure gas line, meter, and regulator are sized properly
6. Ensure appliance is properly grounded
7. Check power supply for proper voltage and voltage drops
8. Disconnect and re-connect all wiring harnesses on Gas Control Valve and
Control Board
If gas supply/installation/maintenance requirements are met:
1. Check gas valves for open or short circuits
2. Check flame rod(s) and flame rod(s) wiring harness for damage
3. Check PCB
4. Check flame rod(s) status