AEROTECH HERMAN NELSON INTERNATIONAL INC.
100 Eagle Drive, Winnipeg, Manitoba Canada R2R 1V5
Phone: 204-633-1999 (24 Hours) Fax: 204-694-1612 Email:
Check Out Our Web site
www.hermannelson.com
New Items Added Weekly
12.18.07 REVISION 1.02
Section 5
• Troubleshooting Cont’d
• • • • • • • • • • • • • • • •
TROUBLE
PROBABLE CAUSE
REMEDY
6
Excessive smoke
1. Air flow restricted
Remove restriction.
emitted from exhaust
2. Diesel engine operating below
normal
speed.
Check engine speed. If incorrect
adjust to 3600 rpm (refer to engine
supplement).
3. Incorrect nozzle spray pattern.
Clean or replace nozzle.
4. Carbon buildup in exhaust system.
Clean exhaust system.
5. Excessive fuel pressure.
Adjust pump pressure (see
paragraph 5.53).
7
Combustor flame cuts
1. Insufficient air supply.
Refer to trouble 2 probable causes
2 and 3.
out
2. Discharge air restricted. Remove
restriction.
3. Burner control valve sensor element
improperly positioned in air stream.
4. Defective burner control valve.
Replace valve.
5. Defective temperature selector
valve.
Replace valve.
6. Clogged nozzle.
Clean or replace.
8
Combustor flame fails to
1. Defective burner control valve.
Replace valve.
go out or unit overheats
2. Defective temperature selector
valve.
Replace valve.
9
Maximum heat output
not obtainable
1. Fuel system leak.
Inspect fuel lines, tighten loose
connections. Replace damaged
fuel lines.
2. Defective fuel pump.
Check pump (paragraph 5.53 to
5.59).
3. Clogged fuel filter.
Inspect and replace filter.
4. Defective temperature selector
valve.
Replace valve.
5. Heat exchanger clogged.
Clean heat exchanger.
10
After burning in
combustion chamber
1. Nozzle check valve being held open
by contaminant.
Clean or replace valve.
2. Defective nozzle.
Clean or replace nozzle.
3. Fuel leak in nozzle holder or fuel
line at nozzle holder.
Tighten or replace fuel lines.
38
