All Models - Timer Board Troubleshooting

Troubleshooting Guide

Troubleshooting Timer Board P/N 0712105

June 2010

8

7 6

1

5

9

4

3

2

Test/Condition

Indication/Cause

Recomendation/Solution

1. Run LED is lit

Board has power

 

 

 

 

Machine is powered up and Run LED

Possible bad start switch, scrub switch

Unplug low voltage plug. If Run LED lights up:

is not lit

or wiring short (does not apply to S.S.

The start switch or scrub switch failed in the closed

 

Pizio switch on model 501 or UH200)

position, or there is a wiring short

 

 

 

Machine is powered up and Run LED

 

Check voltage

is not lit after unplugging the low

 

 

voltage plug

 

 

2. Wash pump runs but nothing else works 4 amp board output fuse is blown

Replace the 4 amp fuse. Check for wiring problem

3.Check continuity of the start switch Check continuity of the scrub switch Check continuity of the cycle light Check continuity of the scrub light Check continuity of door safety switch

 

 

 

15

 

 

 

 

17

EWL

COMMON

 

 

16

CL

8

7

6

5

 

4

3

2

1

 

 

19

 

20

 

18

EWS

 

SS

 

15

 

 

 

 

DSS

 

 

 

 

 

 

 

LOW VOLTAGE SECTION

 

 

 

2 AND 5 VDC

 

 

 

 

Fig. 1

 

Use plug pin #8, wire #15 as common to plug pin # 1, wire #20 (see Fig.1)

Use plug pin #8, wire #15 as common to plug pin # 3, wire #19 (see Fig.1)

Use a meter with diode setting - to cycle light, plug pin # 6, wire #16 and common pin # 8, wire # 15

Use a meter with diode setting - to scrub light, plug pin # 7, wire #17 and common pin # 8, wire # 15

Use a meter with diode setting - to door safety switch, plug pin # 4, wire #18 and common pin # 8, wire # 15

4. Fill LED is lit

Indicates output voltage to fill valve

5.

Select the appropriate setting on the

Note: This solid state timer board is used for

Set dipswitch to FWR for model UH170 and UH200

 

dipswitch for the model of machine

several different models

Set dipswitch to F&D for model 201, 401, 501, UH100

 

the solid state timer will be installed in

 

 

 

 

 

 

6.

Use the skip switch to force the timer

 

Eg: Pressing the skip switch immediately after starting

 

to the next segment of the cycle

 

the cycle will make the machine skip the wash cycle,

 

 

 

and go straight into the drain cycle

 

 

 

 

7.

Use the reset button to reset the solid

The reset button will reboot the solid state timer

 

 

state timer board

board (much like rebooting your computer)

 

 

 

 

 

8.

0.063 amp internal board supply fuse

 

Replace the solid state timer board

 

is blown

 

 

 

 

 

 

9.

Wash motor LED is lit

Indicates output voltage to the wash motor during

 

 

 

wash/rinse cycle only. LED is not lit during soft start

 

 

 

 

 

 

Wash motor LED is not lit, but wash

 

Replace the board

 

motor runs continuously

 

 

67

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Moyer Diebel 501HTN, 401HTN, 201LT, 501LT, 201HTN manual Troubleshooting Guide

201HTN, 401HT, 201HT, 501LT, 201LT specifications

Moyer Diebel is renowned for its exceptional line of commercial dishwashing machines, and the Moyer Diebel 501HTN, 501HT, 401HTN, 201LT, and 501LT models are among the industry's finest. These machines are designed to enhance efficiency, usability, and sustainability in the fast-paced environments of restaurants, cafeterias, and catering businesses.

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