First Choice Metos MM-5, Service Manual

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25.3.2003 Rev. 2.4
Service
14
7.1.3 Control circuit board function description [MM5]
Connections on the control circuit board:
Normal voltage connections:
Low voltage connections:
Adjustments: Rinse and tank temperatures and detergent dosing time can be adjusted with
the 3 potentiometres on the control circuit board.
9. Wash and rinse time check / adjustment che / a che / a
10. Wash and rinse dispenser check c c
11. Wash pump check (pump change in every second basic service) che cha
12. Wash and rinse arms / nozzles check / cleaning che / c che / c
13. Casing tubes, pockets and electrodes cleaning c c
14. Power feed measurement (all phases, neutral and ground) m m
15. Heating elements and motors mega-test measurement m m
16. Heating elements and motors resistance / current measurement m m
17. Heating elements sealing change cha cha
18. Water hoses check / change che cha
19. Water pressure measurement m m
20. Water leaks check and fix che / f che / f
Item Middle
service Basic
service
PPG Program selector. Choice of wash programs 1min, 2 min or 3 min
PR Wash tank pressure switch
MPM Hood limit switch
IG Control switch
SONDA VASCA Tank sensor
SONDA BOILER Boiler sensor
TLB Boiler contactor: 250V~ 16A
TLV Tank contactor: 250V~ 16A
TLP Wash pump contactor: 250V~ 16A
ELC Rinse/fill solenoid valve: 250V~ 16A. Heating is not on during the fill or rinse cycle
PS Drain pump (option) : 250V~ 10A. Drain pump is running only during the rinse cycle.
SC Program signal light: 12V 1W is activated during the program cycle.
TR2 Rinse water temperature adjustment:Temperature is adjustable between 60°C and
90°C
TR1 Tank temperature adjustment: Temperature is adjustable between 4°C and 70°C
TR3 Detergent dosing time adjustment: Dosing is adjustable from 0 to 120 seconds dur-
ing filling and from 0 to 30 seconds in the following wash cycles
E/S Energy saving function: choice with separate short-circuit piece. Energy saving
function keeps the boiler temperature 20°C lower during the stand-by function.