Primus D13 - Will Not Heat - Gas - Rotary Coin Drop

92 70284701
Section 7 Electronic Control Troubleshooting
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83. WILL NOT HEAT – GAS – ROTARY COIN DROP
(Sheet 1 of 2)
T090D
Is there voltage across
terminals 1 & 6 of
the temp control bd?
Is there voltage across
terminals 5 & 6 of
the temp control bd?
YES
NO
Is there voltage at
airflow switch N.C.
terminal to transformer
neutral?
NO
Replace inoperative
switch or correct
airflow vane operation.
NO
YES
Is there voltage at
COM on switch B to
transformer neutral?
NO
Correct wiring
between airflow
switch and COM on
switch B.
Is there voltage from
N.C. on switch B to
transformer neutral?
Replace switch B.
YES
NO
YES
Is there voltage from
terminal 6 on CR2 to
transformer neutral?
Correct wiring
between terminal 6
on CR2 to terminal
N.C. on switch B.
NO
YES
Is there voltage from
terminal 4 on CR2 to
transformer neutral?
Replace CR2.
NO
YES
Correct wiring
between terminal
4 on CR2 &
terminal 1 on
temp control
board.
Is the thermistor
shorted or open?
NO
YES
Replace thermistor.
Replace the
temperature
control board.
YES
CONTINUED
ON NEXT
PAGE
Single and stacked
tumblers with
and without time delay.
Is the unit equipped
with a time delay
board?
NO
YES
Is there voltage on
terminal 3 of fan motor
to transformer
neutral?
With fan motor
running is there voltage
from terminal 5 to
transformer
neutral?
Correct wiring
between terminal
3 of fan motor
and N.C. terminal
on switch B.
NO
YES
Replace fan motor.
Is there voltage on
terminal 1 of temp
board to transformer
neutral?
NO
YES
NO
YES
Correct wiring
between terminal
1 of temp board
to terminal 5
of fan motor.
Power supply to
temp control
board is good.
Is temperature
selection switch
shorted or open?
Replace selection
switch.
YES
NO
T090D