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lights remain on as long as the pumps are on; bear in mind
that the rinse aid peristaltic pump fills the circuit in about 7
minutes, while for the detergent it only takes 2 minutes. So
draw only rinse aid from the jerry cans (1 for the rinse aid
and the other for the detergent) for the first 5 minutes and
then also take in detergent for the last 2.
The dishwasher is able to identify a number of malfunctions and show them on the display.
If the problem persists after the dishwasher has been switched off and back on, proceed as described
below:
Err04
Tank temperature probe malfunction
Err05 Tank water filling malfunction
Water pump-out malfunction
Err06
Err09 Too much water in tank
7 MALFUNCTIONS SHOWN ON THE DISPLAY (FOR
THE TECHNICIAN)
- CW 420/430
Tank temperature probe disconnected or not
working.
The tank does not fill within the allowed time: check
water intake tap, dynamic pressure in intake system,
cleaning of water intake filter, possible damage to
water intake hose or cleaning of rinsing nozzles.
If the problem persists during FILL:
- tank pressure switch has failed (continuous empty
reading: check whether tank safety pressure switch
is tripped)
- leak from pipe connected to air trap
If the problem occurs during work cycle
- filler hose bleeder valve fouled: tank empties
completely at end of a wash cycle due to siphon
effect.
Inspect the filters for dirt and check that the drain
hose is not blocked, bent or crushed.
Check that the drain pump is not blocked by dirt by
removing the insert on the sump (from inside the
tank).
If it persists, check in this order:
- with tank empty: constant "tank full" signal: tank
pressure switch faulty or leak from connections of air
trap connection pipe (water entering pipe)
- with tank full: drain pump failure
With tank full:
see above (water pump-out malfunction)
With tank empty: constant "tank full" signal: safety
pressure switch faulty or leak from connections of air
trap connection pipe (water entering pipe)
20
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