Service manual

70304901 107
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Hybrid Timer Control Troubleshooting
41.Unit Will Not Heat – Electric Coin (T30 Models Only) (continued)
Please see following 2 pages for wiring diagram information.
Replace the stove
limit.
Is there voltage across
the stove limit?
Correct wiring
between heater
contactor and stov
e
limit.
Is there voltage across
the coil(s) of the heater
contactor(s)?
NO
YES
NO
YES
(12)
(13)
Is there voltage to the
T1, T2 and T3
terminals of HC1?
Correct wiring
between HC1 and
line voltage.
Do all elements
produce heat?
Check elements for
shorts or opens.
Check wires
between contactors
and elements.
Is there voltage across
L3 & L1, L1 & L2 and
L2 & L3?
Check for
proper operation of
contactors, replace
them if
necessary.
Is there voltage to the
T1, T2 and T3
terminals of HC2?
YES
NO
Correct wiring
between HC2 and
line voltage.
(14)
(15)
YES
NO
(16)(17)(18)
NO
YES
NO
YES
Unit is operational
Note: Please make
the oppropriate
adjustments if your
unit is single phase.
TMB2008S
TMB2008S