Troubleshooting - Alto-Shaam 20-20W Operator's Manual

Electronic Control Accuracy
The electronic control is a precise instrument and is
designed to offer trouble-free service. If you suspect the
temperature inside the warming cabinet does not match
the temperature indicated on the digital display, after
stabilizing, 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 quality 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 left side of the
unit, is completely clean.
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.
Always check the circuit breaker is turned "On" and your unit is receiving power before calling your Authorized
Alto-Shaam Service Agent.
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.
MN-36608 • Rev 5 • 06/18 • 20-20MW, 20-20W Hot Food Holding Cabinets
Special Features
Heat Recovery
The patented SureTemp™ heat recovery system in this unit
will immediately compensate for any loss of heat when
the door is opened. in order to maintain a more consistent
cavity temperature, the control will automatically apply
heat to the unit's interior while the door is open and for
a short time after the door is closed. If the door remains
open for more than three minutes, the solid state
electronic control will sound three rapid beeps every ten
seconds until the door is closed.
If the appliance has been unplugged for an extended
period of time, the Real Time Clock may require
recharging. Turn main breaker to the unit off for 10
seconds and then restore power. For more information,
see Error Code E-60 in the Troubleshooting section of
this manual.
How to verify sensor integrity
Place the sensor in ice water. Test with an ohmmeter set
to the ohm scale.
Air sensor
If the reading is more than ± 20 ohms, replace sensor.
NOTICE

Troubleshooting

NOTICE
1000 ohms ± 20
DANGER
To prevent serious injury, death, or property
damage, always lock-out or post breaker
panel until service work has been completed.
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