Technical Bulletin, Display Condition | Panasonic NE1757R instruction

Technical Bulletin

Number: E10-2010-08

Date: September, 2010

Panasonic Home and Health Company

Home Appliance Group / Food service

Product: Commercial Mircowave Oven

Model: NE1258R NE1257R NE1757R

NE2157R

This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advice non-technical individuals of potential dangers in attempting to service a product.

Products powered by electricity should be serviced or repaired only by experienced professional technician. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

Subject: Pro 1 Error Codes

1.Check for proper grounding before troubleshooting.

2.Use caution when servicing high voltage circuit.

3.Discharge high voltage capacitors prior to servicing.

4.When checking for continuity of the switches or the high voltage transformer, disconnect one lead wire from these parts and then check continuity with the AC plug removed. To do otherwise may result in false reading or may damage your meter.

5.Be sure to ground any static electricity charge built up in your body before handling the D.P.C. board.

6.120/208/230V AC is present in the shaded area on the power supply circuit board (Terminals of the power relay and primary circuit of the low voltage transformer). When troubleshooting be cautious of possible electrical shock hazard.

NOTE: If the unit is either dead or displays any of the error codes listed below, check the parts listed in possible cause column depending on failure indication e.g. F81, F82 in the display or no display (dead).

DISPLAY	CONDITION		POSSIBLE CAUSE (In order of probability)
		1.	Loose ground screw on the digital programmer circuit
F33	Open temperature sensor (exhaust)	2.	Loose connector CN4
F33	Open temperature sensor (exhaust)	3.	Open temperature sensor (Should read 25k to 85k)
		3.	Open temperature sensor (Should read 25k to 85k)
		4.	Digital programmer circuit failure

F34	Short temperature sensor (exhaust) (Rare)	1.	Digital programmer circuit failure
F34	Short temperature sensor (exhaust) (Rare)	2.	Temperature sensor failure
		2.	Temperature sensor failure

F44		1.	Shorted membrane sw itch

F01	Exhaust temperature exceeds 120° C	1. Burning food in the oven due to overcooking

F05	Memory failure	1. Digital programmer circuit failure

		1.	Right fuse open
		2.	Damaged short sw itch
No Display* (Dead)	No voltage supply to the LV transfomer	3. Shorted H.V capacitor, transformer, diode or magnetron (upper)
		4.	Shorted L.V transformer (Relay board)
		5.	Digital programmer circuit failure

	Excessive current comsumption	1.	Open primary latch sw itch
F81*	Excessive current comsumption	2.	Relay failure RY-3 (Relay Board)
F81*	(upper H.V circuit)	2.	Relay failure RY-3 (Relay Board)
	(upper H.V circuit)	3.	Digital programmer circuit failure
		3.	Digital programmer circuit failure

		1.	Left fuse open
		2.	Open primary latch sw itch
F82*	Excessive current comsumption	3. Damaged short sw itch
F82*	(lower H.V. circuit)	4. Shorted H.V capacitor, transformer, diode or magnetron (low er)
	(lower H.V. circuit)
		5.	Relay failure RY-4 (Relay Board)
		6.	Digital programmer circuit failure

F86	Shorted contacts of RY-3	1.	Relay failure RY-3 (Relay Board)
F86	Shorted contacts of RY-3	2.	Digital programmer circuit failure
		2.	Digital programmer circuit failure

F87	Shorted contacts of RY-4	1.	Relay failure RY-4 (Relay Board)
F87	Shorted contacts of RY-4	2.	Digital programmer circuit failure
		2.	Digital programmer circuit failure

* Please see back of this page on how to troubleshoot F81/F82 error code or dead unit

Panasonic

NE1257R, NE1258R, NE1757R, NE2157R specifications

Panasonic has long been a trusted name in the realm of commercial microwaves, and their models NE1258R, NE1757R, NE2157R, and NE1257R are outstanding examples of innovation, efficiency, and reliability. These microwaves are designed for heavy commercial use, suitable for restaurants, cafes, and convenience stores, where speed and consistency are essential.

The Panasonic NE1258R is equipped with a powerful 1000 watts of cooking power. Its compact size makes it ideal for kitchens with limited space, while its easy-to-use control panel ensures quick operation. One of its standout features is the patented inverter technology, which allows for consistent heating and cooking throughout, minimizing the risk of hot or cold spots in food. This technology enhances the overall quality of food being prepared, making it a favorite among chefs who prioritize precision.

Moving up in size and power, the NE1757R and NE2157R models boast 1750 watts and 2100 watts, respectively. This additional power allows for faster cooking times, ideal for busy environments that demand efficiency. Both models also feature extensive auto-cook programs, facilitating a wide variety of menu options with just the press of a button. The user-friendly interface paired with digital display makes cooking straightforward and reduces the potential for errors.

Another common feature among these models is their robust safety design. For instance, all four models come equipped with a safety interlock system, ensuring that the microwave can only operate when the door is securely closed. Furthermore, a cool-touch door and exterior minimize the risk of burns, making these units safe for staff in a bustling kitchen.

Durability is also a key characteristic. Each model is constructed from high-quality stainless steel, which not only provides a sleek appearance but also resists corrosion and is easy to clean. This design consideration is especially crucial in commercial settings where hygiene and maintenance are paramount.

In conclusion, Panasonic’s NE1258R, NE1757R, NE2157R, and NE1257R models represent a blend of technological advancement and user-centric design. Their high power, inverter technology, robust safety features, and durable construction make them ideal choices for any commercial kitchen looking to enhance efficiency and food quality. These microwaves stand out as powerful tools in the culinary industry, helping operators meet the fast-paced demands of modern food service.