SM-29
Jade Range LLC
– A Middleby Company
Titan
TM
Series Heavy Duty Range
Model Series JTRH, JMRH & JTRHE
REVIEW COPY
7
DOOR SWITCH TEST
N.C.
N.O.
Figure 35: Door Switch Test (Old style)
A. COMMON Connector
Figure 36: Door Switch Test (New style)
A. COMMON Connector
WARNING
PERFORM THE ELECTRICAL LOCKOUT/
TAGOUT PROCEDURE.
1. Shut off all electrical controls and perform the
Electrical LOCKOUT/TAGOUT procedure.
WARNING
PERFORM THE GAS LOCKOUT/TAGOUT
PROCEDURE.
2. Shut off all gas controls and perform the Gas
LOCKOUT/TAGOUT procedure.
3. Remove the oven control panel according to
the procedure under COVERS AND PANELS.
4. Remove the door switch according to the
procedure under REMOVAL AND
REPLACEMENT OF PARTS.
5. Remove the wiring from the switch.
6. Use a VOM to perform a continuity test on
the switch.
7. Check continuity between the common
connector and one of the two other contacts. If
it is open, (no continuity) depressing the switch
should close the connection. If it is closed
(continuity) depressing the switch should cause
the connection to open.
8. Repeat this procedure for the other contact.
9. If either contact fails to switch from open to
closed (normally open contact) or fails to switch
from closed to open (normally closed contact.),
replace the switch.
10. Reverse steps to install switch and oven control
panel.
CONVECTION OVEN
MOTOR TEST
Motor Not Working
CAUTION
DO NOT REENERGIZE THE MOTOR UNTIL
THE PROBLEM IS FURTHER INVESTIGATED
OR FURTHER DAMAGE MAY OCCUR.
1. Check if the motor is seized. If so, remove and
replace the motor according to MOTOR under
the REMOVAL AND REPLACEMENT OF
PARTS procedures. If not, go to step 2.
2. Spin blower wheel clockwise and turn AUTO/
OFF/MANUAL switch to manual position. If
blower motor starts and operates,replace the
start capacitor.
3. Ask the range operator if anything unusual
was noted when the motor stopped working.
A. Did the motor make any unusual noise?
Spin the fan to check for bearing noise,
excessive shaft play, loose fan or ducting
parts, etc. If bearing noise or shaft play is
found, remove and replace the motor.
Repair any loose fan or ducting parts.
B. Was there any smoke or odd odor? If so,
determine the specific source: Control
panel? Junction Box? Motor itself? Inspect
and repair as required.
C. Did a circuit breaker trip? Use a voltmeter
to check and see if there is a short to
ground in the motor circuit.
