Washtech XP Service Manual download pdf (Page 16)

Timer

Part Number

32822

Function

Provides an automatic timing sequence of the wash, rinse, detergent and rinse aid injection

stages in a dishwashing cycle.

Description

The electromechanical timer has a main drive motor and gearbox which produce a full

rotation of the seven cams in 180 seconds. The advance motor and gearbox speed the

rotation of the timer to produce shorter cycles of 60 and 120 seconds. The timer cams

operate individual changeover switches in sequence during the rotation. The cams are

numbered from the main motor end. T1 controls the main motor, T2 – wash pump,

T3 – rinse solenoid, T4 – rapid advance motor for 60s cycle, T5 – rapid advance motor for

120s cycle, T6 – detergent injector if fitted, T7 provides thermostop function.

Diagram

Replacement

To replace the timer take note of the position of each connection, preferably on paper.

Disconnect all wires and remove the timer from the tray. Compare the cam setting of the

old and new timer to ensure that special settings are duplicated. Fit new timer taking care to

locate cam T1 in the same relative position. Reconnect the wires ensuring that no

termination is under strain. Test the machine to confirm correct operation.

Adjustment

The timer cams T2, T3, T6 and T7 are adjustable. The time settings on these cams can be

increased by making the gap in a cam wider, or reduced by reducing the gap. Use a timer

adjusting tool, supplied with the machine to modify a gap in the timer cams.

NOTE:

To increase (or decrease) detergent injection time adjust only the red

sector of the cam T6. The yellow sector sets the beginning of the detergent

injection at the start of the shortest wash cycle. If injection time is extended by

yellow sector adjustment it will be skipped on fast cycles.

IMPORTANT

The factory setting of the cam T3 allows for a 12 sec hot rinse. Reduction of this

time is prohibited by Health regulations. Extending this setting will increase hot

water consumption of the machine and may result in delays between the cycles as

this additional water is heated.

Service Manual XP-2

Revision 1C

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Washtech XP Service Manual Page 16