18 MN-29578 • Rev 6 • 04/17 • 1000-BQ2 Banquet Cart
Troubleshooting
Thermostat Accuracy
The electronic thermostat is a precise instrument and is
designed to offer trouble free service. If you suspect the
temperature inside the holding compartment does not
match the temperature indicated on the digital display,
follow the instructions listed below.
1. Check to make certain the unit voltage matches the
power source. A power source less than that required to
operate the unit will result in inaccurate temperatures.
2. Verify the temperature inside the holding compartment
with a qualify thermal indicator.
A. With the exception of the wire shelves, completely
empty the holding compartment.
B. Make certain the holding cabinet sensor, located
inside the holding compartment at the le side of the
unit, is completelyclean.
C. Suspend the thermal indicator in the center of the
holding compartment.
D. Allow the temperature set on the electronic
thermostat to stabilize for a minimum of one hour
before comparing the digital display with the reading
on the thermal indicator.
Do not open the cabinet door(s) during the temperature
stabilization period.
If the reading on the thermal indicator does not match the
digital display, there may be a problem with the air sensor.
See troubleshooting guide in this manual; or call the
factory service department for advice.
How to verify sensor integrity
Place the sensor in ice water. Test with an ohmmeter set to
the ohm scale.
Air sensor 1000 ohms ± 20
If the reading is more than ± 20 ohms, replace sensor.
This section is provided for the assistance of
qualified and trained service technicians only
and is not intended for use by untrained or
unauthorized service personnel. Failure to
observe this precaution may void the warranty.
To prevent serious injury, death, or property
damage, always lock-out or post breaker
panel until service work has been completed.
NOTICE
This section is provided for the assistance of qualified and trained service technicians only and is not
intended for use by untrained or unauthorized service personnel. Do not attempt to repair or service the oven
beyond this point. Contact Alto-Shaam for the nearest authorized service agent. Repairs made by any other
service agents without prior authorization by Alto-Shaam will void the warranty.
Always check the circuit breaker is turned “On” and your unit is receiving power before calling your Authorized Alto-
Shaam Service Agent.
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