TM 9-4520-271-14
UNIT TROUBLESHOOTING PROCEDURES
ARMY SPACE HEATER H-140
NSN 4520-01-477-0568
TROUBLESHOOTING INDEX
INTRODUCTION
The Troubleshooting Index contains a quick reference by work package and page number for the Troubleshooting Procedures
work package (WP 0012 00). The Troubleshooting Procedures work package (WP 0012 00) identifies malfunctions and
corrective actions to return the ASH to operational readiness.
Malfunction/Symptom
Troubleshooting Procedure Page No.
1.
Ventilation Air Fan Does Not Operate in Manual Mode........................................................................................0012 00-3
2.
Ventilation Air Fan Does Not Operate in Auto Mode ............................................................................................0012 00-7
3.
Combustion Air Fan Does Not Operate in Manual Mode ....................................................................................0012 00-15
4.
Combustion Air Fan Does Not Operate in Auto Mode ........................................................................................0012 00-19
5.
Fuel Pressure Gage Indicates 25 Psi (172 kPa) or Less in HEAT MANUAL MODE or
HEAT AUTO MODE...........................................................................................................................................0012 00-23
6.
No Fuel Pressure Is Indicated ...............................................................................................................................0012 00-25
7.
Low Fuel Pressure Is Indicated.............................................................................................................................0012 00-29
8.
Excessive Black Smoke in Exhaust ......................................................................................................................0012 00-31
9.
Ventilation Air Fan Motor Slows Down or Indicator Lights Dim........................................................................0012 00-33
10. Improper Spark or No Spark in Igniter .................................................................................................................0012 00-35
11. ASH Backfires or Rumbles in HEAT MANUAL MODE or HEAT AUTO MODE ...........................................0012 00-39
12. No Combustion in HEAT MANUAL MODE (FLAME OUT Indicator Is On)...................................................0012 00-41
13. No Combustion in HEAT AUTO MODE (FLAME OUT Indicator Is On) .........................................................0012 00-45
14. CARBON MONOXIDE ALARMS Sound and Light..........................................................................................0012 00-49
0011 00-1/2 blank
