TM
5-5420-226-20-1
Symptom-73
DETAILED
TROUBLESHOOTING
PROCEDURE
T
SUPPORT
SYSTEM
- PERSONNEL
HEATER
(Continued)
k
Check for electrical
power at the left N.O. contact
on
the
flame
detector
switch.
Second
Technician
(Operators
Station)
l Set HEATER
MASTER
switch
OFF.
First
Technician
(Personnel
Heater)
l Loosen two screws and remove personnel heater cover.
l Set multimeter
to measure
18 to 30 volts dc. or use STE/
ICE Test
No.
89 (page
4-81).
l Connect red probe of meter to the left N.O. contact on
the flame detector
switch
and
black
probe
to ground.
Second
Technician
(Operators
Station)
l Set HEATER
MASTER
switch
ON.
First
Technician
(Commanders
Station)
l Check if meter indicates
18 to 30 volts dc.
Does meter
indicate
18 to 30 volts dc?
B
,
ADI
o
-n
+
o
II
II
TO VEHICLE
GROUND
\
\
l Set HEATER
MASTER
switch
OFF
l Set PERSONNEL
HEATER
H1/
LO switch
OFF.
l Install personnelheater cover.I
TA107377
l Replace
personnel
heater
(page
18-2).
4-688