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PMA–5/12 AND PMA–5/18 OWNER'S MANUAL MAINTENANCE AND CLEANING GUIDE
NU–VU® FOOD SERVICE SYSTEMS MENOMINEE, MICHIGAN 49858
(906) 863-4401 SALES FAX (906) 863-5889 • SERVICE FAX (906) 863-6322 page 13
SERVICE AND REPLACEMENT GUIDE
Your PMA-5/12 or PMA-5/18 has been designed to be serviced quickly and easily. In fact, any individual who
has average mechanical ability can do the work. Our Service Department is also available to you Monday
through Friday from 7:00 a.m. to 5:00 p.m. (Central Standard Time) should you find yourself with a situation or
problem other than what is outlined here. Our technicians are also available via pager from 7:00 a.m. to 10:00
p.m. during week-ends and holidays. Call NU-VU
®
at (906) 863-4401 and ask for our Service Department to
order replacement parts, ask questions, or offer comments.
This SERVICE AND REPLACEMENT GUIDE has been prepared to cover most normal service problems. If
this "trouble-shooting" information does not provide a solution for your particular problem we ask that you call
us for direct assistance. Calling our Service Department before
calling in a repair technician can usually save
you both time and unnecessary expense. We want to do everything we can to minimize your "down-time".
You may need to remove an access panel for servicing. DO NOT allow any access panels to drop. When work
on the component is finished replace the panel with care, making sure that all wires are properly placed and not
pulled or pinched. If more than one component is being worked on try to remove only one component at a time.
TEMPERATURE CONTROL, How to Adjust:
A. Place a reliable thermometer (or the thermocouple of a test instrument) on a pan in the center of the
Oven. Turn the unit ON and set the Temperature Control [22] to its normal setting. Allow the
equipment to reach a stable operating temperature.
B. Compare the Temperature Control setting to the reading on the test instrument when the
Temperature Control Indicator Light [23] goes out. If there is a difference of 25° or more you will
most likely need to recalibrate the Temperature Control.
ATTENTION:
Please call the NU-VU
®
Service Department for the correct procedures to recalibrate
your Oven!!!
C. If the difference is more than 5° but less than 25° a simple dial adjustment may solve the problem:
1. Remove the Knob of the Temperature Control by pulling it straight out from the face of the
Control Panel.
2. Hold the black Knob securely with the back of the clear plastic dial toward you. Use a Phillips
screwdriver to loosen the two screws from 3/4 to 1 full turn, but do not remove them!
3. To increase
the temperature inside the Oven carefully rotate the index line on the clear dial
clockwise. Each "click" of adjustment is equal to approximately 5° of temperature change in the
Oven. To decrease
the inside temperature rotate the clear dial counter-clockwise.
4. Gently tighten the dial screws and install the Knob. Check the Control setting against the test
instrument and repeat this procedure if necessary.
D. If this procedure fails to bring the temperature reading within the desired specs the Temperature
Control or Temperature Control Sensor [6] may need to be replaced.