J&R 700E, Operation And Service Manual

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TROUBLESHOOTING
1). P
ROBLEM
Combustion air damper and exit flue fails to open and close.
C
AUSES
One of the following components is inoperative:
(a) the thermostat,
(b) the damper motor, or
(c) the linkage between the motor and the dampers.
P
ROCEDURE
(a) Open the access door to flues and dampers. (see Figure 1)
* If the motor is very warm to the touch, it may be that the
motor is okay but mal-adjusted so that it is going out on its
internal overload. Check for proper adjustment of the linkage
before replacing the motor.
(b) there is a restriction in the smoke exit system,
(c) there is excessive heat loss due to the bypass dampers not
sealing properly,
(d) there is insufficient make-up air supply, or
(e) there is insufficient wood in the firebox.
2). P
ROBLEM
Adequate cooking temperatures cannot be maintained and /
or excessive smoke leakage from the pit.
C
AUSES
One of the following:
(a) the combustion air damper and exit flue damper are not
opening,
(b) Make sure that the linkage is attached to the motor and
that all pivot pins are in place. A simple adjustment
may be all that is necessary.
(c) Inspect the Temperature Control Damper Acuator With a
volt meter , check to see if the actuator motor circuit is live
by turning the thermostat to its highest setting and check
the motor lead-in wires. If 120 volts is present , shut off
th e pit electrical supply and replace the motor.* If 120
volts is not present , the problem is in the circuitry between
the actuator and the Main Control Thermostat. Use the volt
meter to trace the control circuit to find the problem, which
might include the High Limit Thermostat.
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