ALLIANCE T30 Series Troubleshooting Manual page 60

Electronic Control Troubleshooting
33. Will Not Run – Electric – Manual Timer (continued)
Is this a single phase
or three phase unit?
Single phase
**
Is there voltage
across terminal 7 & 4 of
the motor control
relay?
NO NO
Is there
voltage at terminal 5
on the motor control relay
to supply
neutral?
YES
Is
there voltage
across terminals 5 & 3
of the motor control
relay?
NO
Is
there voltage
across terminals 1 & 4
of fan motor?
YES
Does the fan motor
run?
YES
** Tested with the start switch pressed in.
58
Three phase
YES
Replace motor
control relay.
Correct wiring
NO
between terminal 5
and supply voltage.
YES
Replace motor
control relay.
Correct wiring
between fan
NO
motor and contact
8 on the motor
control relay.
NO
Replace the fan
motor.
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Is there
voltage across
YES
terminals 14 & 13 of
motor control relay?
NO
NO
Is there voltage to L1
of motor control relay?
YES
Is there voltage to L2 NO
of motor control relay?
YES
Is there
voltage across
YES
L1 to T1 and L2 to
T2 on the motor
control relay?
NO
Note: Only for non time
delay machines
Is there
YES
voltage across terminals
3 & 5 of the fan motor
centrifugal switch with
the fan motor
running?
NO
Continued on next
page.
Replace motor
control relay.
Correct wiring
between L1 and
power supply.
Correct wiring
between L2 and
power supply.
Replace motor
control relay.
Replace fan
motor.
TMB1825S
TMB1825S
70291301