Alto-Shaam 500-TH/III trouble shooting Internal Electrical Components, C. To test air sensor

Se r v ice

This section is provided for the assistance of qualified technicians only and is not intended for use by untrained or unauthorized service personnel. If your Alto-Shaam®unit is not operating properly, check the following before calling your Authorized Alto-Shaam Service Agent:

☛Check main power circuit breaker to the unit and verify that the circuit breaker on the back of the unit is turned on, if applicable.

Do not attempt to repair or service the unit 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 on the unit.

trouble shooting Internal Electrical Components

A. No power. Display will not light.

1.Verify that power is available at the outlet or junction box.

2.Verify that the circuit breaker switch on the back of the unit is turned on.

3.Verify that the power cord is not open. Check continuity with a VOM meter.

4.If the problem persists, call a qualified Alto-Shaam service technician at 1-800-558-8744.

B.Display is lit but unit is not heating.

Check to verify that the high limit switch located at the rear of the unit top has not been tripped. If it has been tripped, reset by pressing in the hi-limit reset button at the rear of the oven.

After resetting, the cause of the high limit trip must be corrected. If the high limit switch will not reset, the high limit switch is defective and must be replaced. This is a safety device and must not be bypassed or removed from the circuit.

C. To test air sensor:

Test air sensor by placing sensor in ice water bath and using an ohmmeter set on the ohm scale. The reading should be 100 ohms resistance. If it is more than 2 ohms higher or lower, sensor needs to be replaced.

D. To test probe sensor:

Test food probe by placing in ice water bath and using an ohmmeter set on the ohm scale. The reading should be 100 ohms resistance.

dANgER

dIScONNEcT UNIT FROM

pOwER SOURcE BEFORE

cLEANINg OR SERVIcINg.

NOTE

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.

cAUTION

THiS SECTiON iS PROViDED FOR THE ASSiSTANCE OF QUALiFiED SERViCE TECHNiCiANS ONLY AND iS NOT iNTENDED FOR USE BY UNTRAiNED OR UNAUTHORiZED SERViCE PERSONNEL.

dANgER

LOcK-OUT OR pOST

BREAKER pANEL UNTIL

SERVIcE wORK hAS

BEEN cOMpLETEd.

TH/III installation/operation/service manual (11/12) pg. 29