Specifications

516307 C PUBLICATION DATE 31 JAN 2008.DOC PROGRAMMING MANUAL 47
position of the connector earth wire in the middle position of connector T
5. If the fault is persistent Replace the electronic board
Be sure that the problem is related to the electronic
board and not to a defective temperature sensor
 FAILURE 20: DEFECTIVE TEMPERATURE SENSOR 2
Failure 20 occurs when the temperature sensor is broken. The fault is only displayed when the machine is
in standby mode and no program is active.
The fault can only be erased by switching off and on the power. If the fault is still present after switching on
the power : fault message 20 will be generated again.
A skilled and experienced technician must examine the heating-and air outlet system before the machine
is put in operation again.
DIAGNOSE:
1. Check if the temperature sensor is
connected on the PCB Board.
The Female connector must be connected with the
Male connector T2 of the PCB board.
2. Check the temperature sensor If the temperature sensor is broken: replace the
temperature sensor
3. Measure the resistance of the sensor If the resistance is not OK, replace the temperature
sensor
4. Check if the earth wire is at the middle
position of the connector
If the earth wire is not at the middle position: put the
earth wire in the middle position of connector T
5. If the fault is persistent Replace the electronic board
Be sure that the problem is related to the electronic
board and not to a defective temperature sensor
 FAILURE 22: IGNITION ERROR AT STARTUP, GAS HEATING ONLY
Failure 22 occurs when the heating system has a problem to switch on the fire at start up.
If the problem is still persistent after 3 automatic resets, error message 22 is generated.
The dryer computer will try up to 9 times to turn on the gas heating.
The gas ignition system closes contactor KA3 (input 4 High) to inform the dryer computer that the gas
ignition system failed to switch on the fire.
Then the ignition system is reset by the dryer computer by switching on the reset signal gas ignition system
(contactor KA2))
A skilled and experienced technician must examine the heating- and air outlet system before the machine
is put in operation again.
DIAGNOSE:
1. Check the gas supply. Without gas supply, the heater can’t function.
Right Gas supply and pressure must be available.
2. Check the heating system. If the heating system is broken repair, replace the
heating system.
3. Check the gas ignition system. If the gas ignition system is not functional, replace
the gas ignition system.
4. Check the heating contactor. If a heating contactor is not functional replace the
component.
5. Check contactor KA3 (Ignition Error). If the contactor KA3 is not functional replace the
component.
6. Check the wiring. If the wiring is damaged, repair the wiring.
7. Check the output relays that controls the
heating system.
If an output relay is not functional, replace the
electronic card.
8. Check the electrical Input Ignition Error at
the electronic card.
If the input of the electronic card is not functional
anymore, replace the electronic card.