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NetMaster Troubleshooting
62.Motor Will Not Start/Run
Is there voltage across
H2-1 and H2-6 on
the electronic control ?
M
otor Start/Run
YES
Replace electronic
Control.
Is there voltage
across H2-4 and H2-6
on the electronic control?
Is there voltage at
term
inal 5 of the
m
otor control relay?
Is there voltage at
term
inal 8 of m
otor
control relay?
Is there voltage across
term
inals 1 & 4 of
the fan m
otor?
Does the fan m
otor
run?
Is there voltage at
term
inal 6 of m
otor
control relay?
Is there voltage at
term
inal 9 of m
otor
control relay?
Replace
control.
Correct wiring
between term
inal 5
and power supply.
Replace m
otor
control relay.
Correct wiring
between fan m
otor
and m
otor control
relay.
Replace fan m
otor.
Correct wiring
between term
inal 6
of m
otor control
relay and supply.
Replace m
otor
control relay.
NO
YES
YES
YES
YES
YES
NO
NO
NO
NO
YES
YES
NO
NO
Note: test conducted with vend
price satisfied and start button
pressed.
Note: tests conducted with vend
price satisfied and start button
pressed.
Correct wiring
between L1, L2 and
power supply.
Replace m
otor
control relay.
Is the unit equipped
with single phase or
three phase power?
Is there supply voltage
to L1 and L2 of the
m
otor control relay?
Is there votlage across
L1 & T1 and L2 & T2?
Single phase
NO
YES
YES
NO
3 phase. Also
see note on
next page
Is unit equipped with
single phase or three
phase power supply?
Is there supply voltage
between L2 & L3 of
m
otor control relay?
Three phase. Also
see note on next
page.
NO
YES
Is there voltage across
term
inals L2 & T2 and
L3 & T3?
Correct wiring
between L2, L3 and
supply.
Replace m
otor
control relay.
YES
NO
Single phase
Single and stacked
units. G
as, electric and
steam
heat. Single and
three phase supply.
Motor (cylinder/fan)will not
start/run
NO
Refer to "Door
open" flow chart.
(1)
Is there voltage
across the coil of
the motor control
relay?
Correct wiring to coil
of m
otor relay .
(2)
YES
NO
(3)
(4)
(5)
(6)
(7)
(8)
(10)
(11)
(12)
(13)