Electrical Trouble Shooting Chart - Hobart TM416 Operation And Maintenance Instruction Manual

OPERATIOti; MdlNTENANCE, AtiD OVERHAUL MANUAL TM-416
MOTOR-DRIVEN GENERATOR SET, SEZIES 5503A AND 5507A :
TROUBLE, SYMFTGM
v
TEST, CHECK, AND
AND COND IT IGN
PROBABLE CAUSE
REMEDY
MOTOR CbNTROLS
t
1. Motor will not start whe
START button is pushed.
Indicating light (1 A)
does NCT glow.
A. No input power to
term inal panel
(1) Remotely locatec
1 disconnect switcl
OFF.
(2) Input line fuse
"blown" or input
circuit breaker
(if useb) 'tripped.
B. Overload relay
(1 OL) tripped.
C. Overload relay
(1GL) contacts or
operating mechanisn
defective.
D. Control transformer
overload relay
(20L) defective.
E. Control transformer
(1T) defective.
A.
B.
s
- . .
1.
.
Restore power,
(1) Turn switch ON.
(2) Replace fuse or reset cir-
cuit breaker. Check input
circuit for loose connecfioi
or short circuit. Repair
before operating unit.
Check voltage between TP
(test point) 107 and TP 108. If
indicated input voltage is near
normal (see l-l; Fig. 2) for the
machine, overload relay ('IOL)
has tripped and has not reset.
See "C " be low.
Check voltage between TP 107
and TP 108. If a voitaae is
indicated, contacts are de-
fective. Replace overload
relay (1 OL).
Check voltage between TP 111
and TP 112. A voltqe oi 115
V AC indicates relay (2CL?
is defective. Replace relay.
Check for correct connecticn
to transformer taps. See motor
schematic diagram, Fig. 1.
Check for normal, 115 V AC
between TP 110 and TP ! 11.
If voltage is abnormal, +rans-
for&r is defective. Replace,
Feb 27/26
Electrical Trouble Shooting Chart
Figure 5 (Sheet 1 of 17)
3-1
Page 7