APPENDIX I
List of malfunctions:
Door opened during the cycle
Check and adjust microswitch of the
door
and function of the interlock.
Open circuit in controlling temperature sensor T1
Check the sensor and connections.
If necessary, change the sensor.
Short circuit in controlling temperature sensor T1
Check the sensor and connections.
If necessary,
Open circuit in verifying temperature sensor T2
Check the sensor and connections.
If necessary, change the sensor.
Short circuit in verifying temperature sensor T2
Check the sensor and connections.
If necessary, change the senso
Disinfection temperature over set value
Check heating coils and contactor; steam pressure
and steam valve in steam heated machines
Power supply phases in wrong order
Pump is runing wrong direction, change phase order
of the power cable.
The machine does not get water
Check water supply solenoid valves, mud filter and
water level switch in tank, air valves must be open.
Water level switch of the tank does not change
position or
circulation water pump does not work
.
There is water in tank wrong time.
Check water level switch and pump.
Check function of air valves.
Drain bolcked ? Leakage of water valves ?
Fault in heating, temperature does not rise
(20
°C /10 min)
Check heating contactor, coils and overheating
protector. Steam supply in steam heated models.
There is water in chamber bottom (water trap) =>
check the function of siphonage valve.
Air valve(s) are not open. foam in steam generator.
Low circulatin water pressure
and it’s running direction .
Foaming ?
Check pressure sensor. Air valves and siphonage
valve must be closed during recirculation wash.
Chamber outlet or drain sieve blocked ?
Check function of tank valve (part 2.40); only in open
air gap models.
Temperature difference between sensors T1 and T2
is over 2 °C
the temperature sensors T1 and T2
Check pump is running. Check function of water level
switch. Drain blocked ?
Check the function of interlock and micro-switch
(manual door model)
Door lock does not open (automatic door only).
Check and adjust lockmotor and microswitches.
Door is open (automatic door only).
Check and adjust doormotor and microswitches.
Door does not open (automatic door only).
Check and adjust doormotor and microswitches.
Thermal relay of circulation water pump tripped
Check the reason for pump’s overload (obstacles
inside piping ?)
Door lock opened during the cycle
Check and adjust microswitch of the door lock.
Temperature has dropped under the set value
under the set value. Check: heating coils, contactor
and overheating protector. Foam or scale in steam
generator? Check steam pressure and valves in
steam heated machines.
Fault in detergent flow sensor
Temperature difference between sensors T1 and T2
is over 10
°C
By starting the machine the temperature difference
between sensors ia over 10
°
Fill/change the container, check detector
Door is not closed in the beginning of the cycle
Check door microswitch and door functions
Pressure sensor p1 has short circuit
Check the sensor and connections.
If necessary, change the sensor.
Electric board temperature too high
Automatic thermostat max 50
Does the fan run ? Ambient temperature >50
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