Panasonic NE-1252 User manual

© Panasonic Corporation 2012 Unauthorized copy-
ing and distribution is a violation of law.
Order Number MOD1206355CE
Commercial Microwave Oven
Model No. NE-1252
Model No. NE-1752
Model No. NE-1772
Model No. NE-2152
Model No. NE-12521
Model No. NE-12523
Model No. NE-17521
Model No. NE-17523
Model No. NE-17723
Model No. NE-21521
Model No. NE-21523
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 2
2 Specifications ----------------------------------------------------- 3
3 Technical Descriptions ----------------------------------------- 4
4 Location of Controls and Components ------------------- 5
5 Installation Instructions ---------------------------------------- 6
6 Operating Instructions------------------------------------------ 7
7 Test Mode ----------------------------------------------------------12
8 Troubleshooting Guide --------------------------------------- 14
9 Disassembly and Assembly Instructions--------------- 17
10 Measurements and Adjustments -------------------------- 22
11 Schematic Diagram -------------------------------------------- 25
12 Exploded View and Replacement Parts List ----------- 29

2
1 Safety Precautions

3
2 Specifications
Models: NE-12521
NE-12523
NE-1252 NE-17521
NE-17523
NE-17723
NE-1752
NE-1772
NE-21521
NE-21523
NE-2152
Power Source: 120 V AC Single Phase 60 Hz 208/230 V AC Single Phase 60 Hz
Power Requirement: 1990 W, (17.3A) 1970 W, (17.1A) 2650 W, (13.6A)
208 V
2610 W, (13.5A)
208 V
3160 W, (16.3A)
208 V
3120 W, (16.1A)
208 V
2650 W, (12.2A)
230 V
2610 W, (12.2A)
230 V
3160 W, (14.9A)
230 V
3120 W, (14.7A)
230 V
*High
frequency
Output:
HIGH (P10) 1200 W 1700 W 2100 W
MED (P5, P4) Approx. 55%~45% Approx. 55%~45% Approx. 55%~45%
DEFROST (P1) 340 W 340 W 340 W
Microwave Frequency: 2,450MHZ
Timer: Maximum programmable time for single stage heating
P10-P2 power = 15 min.
P1 (DEF) = 30 min.
Outside Dimensions: 16 5/8 inch (W) X 20 inch (D) X 13 1/4 inch (H)
422 mm (W) X 508 mm (D) X 337 mm (H)
Inside Dimensions: 13 inch (W) X 12 7/32 inch (D) X 6 7/8 inch (H)
330 mm (W) X 310 mm (D) X 175 mm (H)
Weight: 56 lbs/25.5 kg 60 lbs/27.5 kg 66 lbs/29.5 kg
*Output power: IEC705-88 Test procedure
Specifications subject to change without notice.

4
3 Technical Descriptions
3.1. Description of operating sequence
Variable power cooking control
The coil of power relays are energized intermittently by the digital programmer circuit, when the oven is set to MEDIUM or
DEFROST power position. The digital programmer circuit controls the ON-OFF time of each power relay contacts in order to
vary the output power of the microwave oven. One complete ON and OFF cycle of the power relay is 44 seconds. The relation
between indications on the control panel and the output power of the microwave oven is as shown in Figure.

5
4 Location of Controls and Components
4.1. Outline diagram

6
5 Installation Instructions
5.1. Wiring requirements and power source voltage selection
Wiring Requirements
No other appliance should share the circuit with the micro-
wave oven. If it does, the branch circuit fuse may overload
and either cause the oven to heat slower than expected or
blow the fuse.
1. For Mode NE-12521/NE-12523/NE-1252
The oven must be on a SEPARATE, 20 Amp, 60 Hz-120V
GROUNDED CIRCUIT.
2. For Model NE-1752/NE-1772/NE-17521/NE-17523/NE-
17723
This oven must be on a separate, 60 Hz GROUNDED
CIRCUIT-minimum 15 amps.
3. For Model NE-21521/NE-21523/NE-2152
This oven must be on a separate, 60 Hz GROUNDED
CIRCUIT-minimum 20 amps.
Power Source Voltage Adjustment
For 208V/230V models
The microwave oven automatically detects 208 V and 230
V-240 V. Insert the plug, and if the Digital Display Window
goes blank 10 seconds after use, unplug and insert the plug
again.

7
6 Operating Instructions
6.1. Operation procedure
1. Manual heating for single stage 2. Manual heating for 2nd or 3rd stage
NOTE: For a 3rd stage heating cycle, select a further
power level and time between steps 3 and 4 above.

8
3. Memory setting for single stage
TO PROGRAM MEMORY AREA B: Follow steps 1 above.
Touch the Memory Shift pad twice and a small [B] will
appear beneath the flashing [PROG].
Touch the memory pad you wish to program, and the previ-
ously selected time and power level will appear in the dis-
play window.
NOTE: Once the Memory area B has been selected it
cannot be changed back to Memory area A. If you do
not require Memory area B, cancel it by touching the
cancel pad and begin again.
4. Memory setting for 2nd or 3rd stage
NOTE: For a 3rd stage heating cycle, select a further
power level and dial in a time, between steps 3 and 4
above.

9
5. Memory pad heating
NOTE: When program is locked, heating can be started
automatically by tapping memory pad.
6. Programming Double or Treble Quantity Pad

10
7. Memory Pad Heating for Double or Treble Quantity Heat-
ing
8. To Read the Cycle Counter
NOTE: Total cumulative number includes programming
memory heating and manual heating number of times
has been used. Cooking times over 99,999 times will be
back 0.
9. To Activate Program Lock