Trane Gas Unit Heaters Wartungshandbuch
36
GAND-SVX01B-EN
Diagnostics
Troubleshooting
WARNING
Hazardous Service Procedures!
The maintenance and troubleshooting procedures
recommended in this section of the manual could result
in exposure to electrical, mechanical or other potential
safety hazards. Always refer to the safety warnings
provided throughout this manual concerning these
procedures. When possible, disconnect all electrical
power including remote disconnect and discharge all
energy storing devices such as capacitors before
servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized.
When necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been trained in handling live
electrical components perform these tasks. Failure to
follow all of the recommended safety warnings
provided, could result in death or serious injury.
recommended in this section of the manual could result
in exposure to electrical, mechanical or other potential
safety hazards. Always refer to the safety warnings
provided throughout this manual concerning these
procedures. When possible, disconnect all electrical
power including remote disconnect and discharge all
energy storing devices such as capacitors before
servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized.
When necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been trained in handling live
electrical components perform these tasks. Failure to
follow all of the recommended safety warnings
provided, could result in death or serious injury.
Table 7.
Troubleshooting guide
Symptoms
Possible Cause(s)
Corrective Action
A. Flame lifting from burner ports.
1. Pressure regulator set too high.
1. Reset manifold pressure. Refer to
2. Defective regulator.
2. Replace regulator section of combination gas valve or
complete valve.
3. Burner orifice too large.
3. Check with local gas supplier for proper orifice size and
.
B. Flame pops back.
1. Excessive primary air.
1. Close air shutter. Refer to
2. Burner orifice too small.
2. Check with local gas supplier for proper orifice size and
.
C. Noisy flame.
1. Too much primary air.
1. Close air shutter.
2. Noisy pilot.
2. Reduce pilot gas. Refer to
.
3. Irregular orifice causing whistle or
resonance.
3. Replace orifice.
4. Excessive gas input.
4. Reset manifold pressure. Refer to
Replace regulator section of combination gas valve or
complete valve; or check with local gas supplier for proper
orifice size and replace. Refer to
complete valve; or check with local gas supplier for proper
orifice size and replace. Refer to
D. Yellow tip flame (some yellow
tipping on propane gas is
permissible).
permissible).
1. Insufficient primary air.
1. Open air shutters. Refer to
2. Clogged main burner ports.
2. Clean main burner ports.
3. Misaligned orifices.
3. Replace manifold assembly.
4. Clogged flue collector.
4. Clean flue collector.
5. Air shutter linted.
5. Check for dust or lint at air mixer opening and around the
air shutter.
6. Insufficient combustion air.
6. Clean combustion air inlet openings in bottom panel; see
.
E. Floating flame.
1. Blocked venting.
1. Clean flue. Refer to
.
2. Insufficient combustion air.
2. Clean combustion air inlet openings in bottom panel; see
.
3. Blocked heat exchanger.
3. Clean heat exchanger.
4. Air leak into combustion chamber
or flue collector.
4. Determine cause and repair accordingly.