Frymaster 17EC - Manual (Page 79)

7-15
7.4.6 Technician Troubleshooting Guides
TROUBLESHOOTING THE 24VAC POWER SUPPLY SYSTEM
On units with manual
controls, place the
POWER switch in the
ON position.
On units with computer
controls, place the
ON/OFF switch in the
ON position.
Is 24VAC
present on the load side of
the transformer?
Transformer has
failed. Replace.
24VAC Power Supply
System is OK.
Causes are broken or loose wiring
or a failed contactor. If wiring and
connections are verified to be intact,
replace contactor.
Was there an
audible snap from the
contactor indicating the
coil energized?
Yes
Is 24VAC present
across Pins 4, 5, and 6
of the 15-pin connector
on the front of the
contactor box?
No
No
Yes
Yes
In units with manual controls, verify the
continuity of the POWER switch in the ON
position. Replace switch as required.
If the switch is OK, causes are broken
or loose wiring. Check connections and
replace wiring as required.
Yes
The primary indicator of a
problem with the 24VAC
Power Supply System is a
failure of the power light to
i l l u m i n a t e w h e n t h e
POWER switch is placed
in the ON position or the
failure of the computer to
a c t i v a t e w h e n t h e
computer ON/OFF switch
is pressed.
Verify that the power cord is
properly connected to the
electrical service and that
the circuit breaker is not
tripped.
Is line voltage
present on the line side of
the transformer?
No
Cause is loose or broken wiring,
or the electrical service circuit is
dead.
No