Panasonic NE-2180C, NE-3280 manual Troubleshooting Guide

Page 26

NE-3280 / NE-2180 / NE-2180C

15 TROUBLESHOOTING GUIDE

CAUTION

1.Check grounding before checking for trouble.

2.Be careful of the high voltage circuit.

3.Discharge high voltage capacitor.

4.When checking the 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 a false reading or damage to your meter.

When disconnecting a plastic connector from a terminal, you must hold the plastic connector instead of the lead wire and then disconnect it, otherwise lead wire may be open or the connector cannot be removed.

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

6.A 208-230V AC is present at the shaded area ( ) of the power supply circuit board (Terminals of power relays and primary circuit of low voltage transformer). When troubleshooting, be cautious of possible electrical shock hazard.

First of all operate the microwave oven following the correct operating procedures described on pages 4 of this service manual in order to find the exact cause of any trouble.

NOTE:

If the unit shows faulty symptom as shown below, check the parts listed in possible cause column depending on failure indication e.g. F81, F82 in the display.

[TROUBLE] Oven does not operate at all or oven does not start cooking. NE-3280

DISPLAY

CONDITIONS

POSSIBLE CAUSE

TIMING OF FAILURE INDICATION

F33

Open temperature

1. Temperature sensor failure

It is appeared when failure occured.

 

sensor (exhaust)

2. Digital programmer circuit failure

 

 

 

 

 

 

3. Loose connector CN5

 

F34

Short temperature

1. Temperature sensor failure

It is appeared when failure occured.

 

sensor (exhaust)

2. Digital programmer circuit failure

 

 

 

 

F44

 

1. Shorted membrane switch

It is appeared 2 minutes after failure

 

 

 

occured.

F01

Exhaust temperature

1. Burning food in the oven due to over cook

It is appeared when exhaust temperature

(With continuous

exceeds 120°C

 

exceeds above 120°C.

beep sounds)

 

 

 

F03

Input voltage exceed

1. Increase in power source voltage

It is appeared when the unit is plugged in.

 

+ 12.5%

 

Note that it returns normal operation mode

 

 

 

by tapping the STOP pad.

F04

Input voltage is less

1. Decrease in power source voltage

It is appeared when the unit is plugged in.

 

than — 12.5%

 

Note that it returns normal operation mode

 

 

 

by tapping the STOP pad.

F05

Memory failure

1. Digital programmer circuit failure

 

No display

1.25A fuse blown

1. Low-Voltage transformer failure

 

No display

1.25A fuse is OK

1. Thermal cutout failure

 

 

 

2. Low voltage transformer failure

 

 

 

3. Digital programmer circuit failure

 

F81

No voltage supply to

1. Relay failure RY-3 (A)

It is appeared when failure occured.

 

high voltage trans.

2. Loose connector CN256, CN257

 

 

(lower/left)

 

 

3. Digital programmer circuit failure

 

 

 

 

F82

No voltage supply to

1. Relay failure RY-5 (B)

It is appeared when failure occured.

 

high voltage trans.

2. Loose connector CN258, CN259

 

 

(lower/right)

 

 

3. Digital programmer circuit failure

 

 

 

 

F83

No voltage supply to

1. Relay failure RY-7 (C)

It is appeared when failure occured.

 

high voltage trans.

Loose connector CN260, CN261

 

 

(upper/left)

 

 

2. Digital programmer circuit failure

 

 

 

 

F84

No voltage supply to

1. Relay failure RY-9 (C)

It is appeared when failure occured.

 

high voltage trans.

Loose connector CN262, CN263

 

 

(upper/right)

 

 

2. Digital programmer circuit failure

 

 

 

 

F86

Shorted contacts of RY-

1. Relay failure RY-3 (A)

It is appeared when failure occured.

 

3

2. Digital programmer circuit failure

 

 

 

 

F87

Shorted contacts of RY-

1. Relay failure RY-5 (B)

It is appeared when failure occured.

 

5

2. Digital programmer circuit failure

 

 

 

 

F88

Shorted contacts of RY-

1. Relay failure RY-7 (C)

It is appeared when failure occured.

 

7

2. Digital programmer circuit failure

 

 

 

 

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Contents NE-3280 NE-2180 NE-2180C Contents Wiring Material Digital Programmer Circuit Control Panel Operation Procedure NE-3280 / NE-2180 / NE-2180C NE-3280 / NE-2180 / NE-2180C NE-3280 / NE-2180 / NE-2180C Schematic Diagram NE-3280 USA Wiring Diagram NE-3280 USA Schematic Diagram NE-2180C Canada Wiring Diagram NE-2180C Canada Schematic Diagram NE-2180 USA Wiring Diagram NE-2180 USA Description of Operating Sequence Defrost controlCheck the grounding Magnetrons Upper and Lower Disassembly and Parts ReplacementConfirm after repair Disassembly of door assembly Digital programmer circuit boardLower antenna Right and Left Upper antenna Right and LeftVoltage selection 208V→ High voltage capacitor Component Test ProcedureShort/Monitor Switch Both Right and Left MagnetronTemp sensor Thermal protector DiodeProtector diode Measurements and Adjustments Switch operationEquipment Procedure for Measuring Radiation LeakageMeasurement of microwave output Procedure for measuring radiation leakage Troubleshooting Guide Beep sounds Expoded View and Parts List NE-3280 / NE-2180 / NE-2180C Parts List Base AIR Filter Flameu XYN5+C8BN Screw NE-32805X8FOR Noise Filter Door Assemble Escutcheon Base Assemble Packing and Accessories Wiring Material Lead Wire Harness Surge Absorber a Digital Programmer Circuit NE-3280 / NE-2180 / NE-2180C Parts List 3A4 APR

NE-2180C, NE-2180, NE-3280 specifications

Panasonic's commercial microwaves, including the NE-3280, NE-2180, and NE-2180C, are designed to meet the demanding needs of the foodservice industry. Each model is engineered to ensure optimal performance, efficiency, and durability, making them ideal for restaurants, cafes, and catering services.

Starting with the Panasonic NE-3280, it features a powerful 1800 watts of cooking power. This industrial-grade microwave offers a spacious 0.9 cubic feet interior, allowing for larger dishes and more significant quantities of food to be heated at once. The NE-3280 is equipped with a user-friendly touch control panel that provides easy access to multiple power levels and cooking times, which can be stored in memory for quick recalls. A key feature is its inverter technology, which delivers a steady stream of power for even cooking and defrosting, ensuring food retains its texture and flavor without overcooking.

Next, the NE-2180 model also showcases cutting-edge inverter technology but with a slightly lower wattage of 1,200 watts. This model maintains a compact design while providing a substantial 0.8 cubic feet of cooking capacity. It's tailored for smaller kitchens or operations looking for efficiency without compromising quality. The NE-2180 comes with programmable menus enabling quick selection of common cooking tasks, improving speed during busy service periods. Furthermore, the stainless-steel exterior makes the unit easy to clean and resistant to wear over time.

The NE-2180C variant is similar to the NE-2180 but is designed with specific features for enhanced versatility in food preparation. It includes a reliable cooking timer and a convenient one-touch control for reheating items quickly. The NE-2180C also sports a robust construction tailored for high-volume use. All three models boast a design that enhances safety with features like a cooling fan to prevent overheating and a child safety lock.

In summary, Panasonic's NE-3280, NE-2180, and NE-2180C microwaves represent a blend of innovation, reliability, and versatility. Each model is geared toward improving efficiency in commercial kitchens while ensuring the quality of heated food. With their durable design, user-friendly controls, and advanced technologies, these microwaves are essential tools for any foodservice operation looking to enhance its meal preparation process.
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