Troubleshooting - Desa TC100 Manual Del Propietário

WARNING: Never service heater while it is plugged in, connected
to gas supply, operating or hot. Severe burns and electrical shock
can occur.
OBSERVED FAULT
Pilot fails to light
Pilot lights but goes out when
control valve knob is released
Maximum burn rate is low
Soot forming inside heater, flame
100% yellow
Flames are extremely high. Com-
ing out of louvers
6

TROUBLESHOOTING

POSSIBLE CAUSE
1. Natural gas supply valve
closed on gas supply
2. Air in gas line
3. Blockage in pilot orifice
4. Piezo ignition system not
sparking
1. Not enough warm-up time
2. Low gas pressure
3. Thermocouple loose or needs
to be replaced
4. Control valve needs to be
replaced
1. Main burner valve not fully
open
2. Plugged gas orifices
3. Low gas pressure
1. Main burner valve not fully
open
2. Low gas pressure
1. Unit was connected to LP gas
instead of natural gas.
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REMEDy
1. Open natural gas supply valve
slowly
2. Allow several minutes to
purge air with automatic con-
trol valve button depressed
3. Replace pilot orifice
4. Adjust ignitor electrode gap
to 0.12". Check wire lead for
damage. Replace piezo ignitor
and/or ignitor electrode as
necessary
1. Relight, hold automatic control
valve button in 45 seconds
2. Check natural gas for proper
gas supply
3. Tighten connection or replace
thermocouple
4. Replace control valve
1. Fully open main burner valve
by turning the valve handle
towards ON position until it
stops
2. Replace gas orifice
3. Consult natural gas supplier;
check regulator output
1. Adjust main burner valve
slowly towards ON position
2. Consult natural gas supplier
1. Check gas source, replace with
natural gas supply
118535-01A