Nelson SC40A, Installation, Use & Maintenance Manual

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16
C WATER KEEPS ENTERING THE DISHWASHER
POSSIBLE CAUSE SPECIFIC SOLUTION
•
The solenoid valve is dirty;
•
The membrane is torn;
•
The small piston does not move into its housing.
•
Loose connection between small tube and pressure
switch;
•
The air trap or the small tube are pierced;
•
There is water in the pressure switch or in the air
supply tube;
•
Loss of pressure in the pressure switch;
•
The pressure switch is faulty.
•
Electronic board
•
Remove the solenoid valve and clean the
membrane
compensation cutout.
Replace, in the case of a sealed solenoid
valve;
•
Replace;
•
Check and replace the solenoid valve if
necessary.
•
Slightly shorten the tube and re-insert it
by tightly fastening the strap;
•
Replace;
•
Remove the small tube and blow the
internal
water away. Remove the
pressure switch and try to expel the
water from the inside. Replace if
necessary;
•
Unload the dishwasher completely and
reload it;
•
Replace;
•
Check connection and in case replace
the board
D THE WATER IN THE BOILER AND/OR BOWL DOES NOT HEAT UP (MONO-PHASE MACHINE)
POSSIBLE CAUSE SPECIFIC SOLUTION
•
The boiler thermostat may be faulty;
•
The bowl thermostat may be faulty;
•
The safety thermostat may be faulty;
•
The pressure switch contact may be faulty ;
•
The safety thermostat has failed to cut in;
•
The connections or conductors may be faulty;
•
The boiler heating element may be damaged;
•
The bowl heating element may be damaged.
•
Replace;
•
Replace;
•
Replace;
•
Replace;
•
Reset and check the anomaly;
•
Check;
•
Replace;
•
Replace;
D1 THE WATER IN THE BOILER AND/OR BOWL DOES NOT HEAT UP (TRI-PHASE MACHINE)
POSSIBLE CAUSE SPECIFIC SOLUTION
•
A phase is missing from the relay coil;
•
The relay coil may be interrupted;
•
The boiler thermostat may be faulty;
•
The pressure switch contacts may be faulty;
•
The relay contacts may be worn-out;
•
The connections or conductors may be faulty;
•
There is one phase missing;
•
The boiler heating element may be damaged;
•
The connection between the terminals and the
heating element is incorrect.
•
Check;
•
Check;
•
Replace;
•
Replace;
•
Replace the contactor;
•
Check;
•
Check the appropriate circuit;
•
Replace;
•
Check;
•
The bowl heating element may be damaged;
•
The connections or conductors may be inefficient;
•
The bowl thermostat is in the “O” position (OFF),or is
damaged;
•
The contact on the boiler thermostat is incorrect.
•
Replace;
•
Check the bowl contactor and
thermostats;
•
Adjust or replace;
•
Replace;