TROUBLE SHOOTING GUIDE
This guide is recommended for use by a quali
fi
ed service technician familiar with electrical
commercial equipment.
1. Unit does not operate.
- Be sure unit is plugged into correct supply voltage.
- Be sure power switch is turned on.
- Disconnect power cord and check power switch and wiring connections for bad connections.
2. Unit turns on but unit light or blower does not come on. Blower and light should always
be on whenever unit is energized.
- If the light is not on, check and replace the light bulb with a standard 75 watt bulb.
- If the blower is not on, turn off power switch and disconnect power cord. Check wiring to blower
motor. Check motor to see if it turns freely. Check motor and replace blower if showing an open
circuit on continuity test.
3. Center rotisserie motor does not work. Motor will turn only when door is closed
completely.
- Check for door magnet on top door glass. This energizes a proximity switch in the unit when the
door is closed. If it is not there it must be replaced to energize motor. If it is there and motor does
not work, try repositioning on door glass to energize motor. If this fails then check rotisserie motor
and wire connections. Also check proximity switch by doing a continuity check on switch with
door closed. If switch is working on a closed door then the rotisserie motor must be checked and
replaced if necessary.
4. Unit turns on, everything works but cabinet does not heat up.
- Check electronic control on top front of unit. Verify that the unit is set for a warmer air temperature
than room temperature. Set it for 140°.
- If unit does not heat up after operating for several minutes, several things must be checked to
determine the cause.
a.
With the control set at 140°F, check the power to the air heater element relay from the
control board. It should be about 12 V.D.C. to the relay coil. If it is then the board and the
air temperature thermistor sensor are working. If not then the sensor and board must be
checked. The sensor should read about 4,000-5,000 ohms at room temperature. Resistance
on the probe will drop as the temperature increases. If it reads open then replace it. To
check the board, install a 5,000 ohm 1/2 watt resistor for the suspect sensor. The board
should supply 12 V.D.C. power to the relay. If it doesn't, then the board is defective.
b.
If the relay is getting energized by the board and the air heater element is still not working,
check the voltage out of the power side of the relay. It should be 0 VAC. If not, then replace
the relay.
- If relay is working and the wiring is all intact and tightly connected, then the heating element must
be checked.
- Disconnect heating element and check for continuity. You should measure a low ohms reading
like 15-20 ohms. If nothing, then replace heating element.
