Last revised 12-31-2002
Michael L. Beilman
Macintosh HD:Users:sbasley:Documents:Microsoft User Data:Saved Attachments:Perfect Temp Thermalization Cart Troubleshooting Guide 123102[1].doc
PERFECT TEMP THERMALIZATION CART TROUBLE SHOOTING GUIDE
Symptom: One side of cart is not working.
1. On the refrigerator that the cart was connected to, there is a grey box on top of the
refrigerator that is about 11” X 10” X 6”. This is referred to as the “Power Module”.
There may be a circuit breaker that has popped out on this unit. Look at the left hand
side of the box. There are (4) electrical type switches/breakers. The breaker that you
want to look at has a white end. If it has popped, it will be protruding out
approximately ” from the side of the box. Push this breaker back in to make it flush
with the box.
2. On the cart, over the heater pad control switches, there is a breaker similar to the one
on the “power Module” detailed above, except it has a rubber boot over it. Check to
see if these breakers have popped. There is one on each side of the cart, be sure to
specifically check the side that is not working. Push these breakers to be sure that
they are flush.
3. Turn OFF all of the switches on the cart.
4. Plug the cart into the refrigerator drop cord, outside of the refrigerator.
5. Perform a manual start. Any meal choice is adequate.
6. Begin turning on each heater pad level, one at a time. First the soup switch, then the
entrée. Turn it on and listen for a pop noise. Check the breaker on that side of the
cart to see if has popped out. Turn off the heater pad for that level and go onto the
next switch. Again, listen for a pop. You will only need to leave each switch on for
about 15 seconds. The objective is to find out what level in the cart has a short.
7. Mark the heater pad switch/level that caused the breaker to pop. This is usually done
by placing a short piece of tape over the switch. Turn this heater pad switch off.
Again be sure that this switch is marked.
8. Check the breaker on the Power Module (ref. item #1). Reset if required per the
instructions described in item #1.
9. Check the cart breakers (ref. item #2). Reset if required per the instructions
described in item #2.
10. There may be several reasons as to why the breaker popped but the cause is most
likely the heater pad associated with that switch. Remove and replace the heater pad
as follows:
10.1. Verify that Cart is NOT PLUGGED INTO POWER SOURCE.
10.2. Obtain the following from the spare parts kit – screwdriver, heater pad,
silicone.
10.3. Remove the two Phillips head screws from the pad (one each side).
10.4. Remove the heater pad. The pad may be moved up and down slightly to help
in removal. Exercise caution not to damage the rubber boot behind pad. Pull
pad straight out towards you. DO NOT twist the pad.
10.5. Remove the excess dried up silicone from the aluminum support, adjacent to
the rubber boot on the cart.
10.6. Prepare the new pad for installation by applying a thin film of the silicone to the
round area on the back of the pad, near the two gold electrical pins. The
sealant is used to prevent moisture from making contact with the electrical
pins. Sealant on the electrical pins is not preferred.
10.7. Verify that the female pin holes in the rubber boot on the cart are aligned
vertically (up and down direction).
(35 Seiten)
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