Merloni Documentazione Tecnica Print Close Newsn1040296 title List of EVOII FAULTS and troubleshooting body If a fault occurs on the washing machine then the self test function will display this, or the new hardware key may be used to show the fault. The type of fault can be signalled in different ways: • on AVD models the fault is shown directly on the machine display. • On AVL models the fault is signalled by LEDs. 2.10.4 Reading of Faults signalled by LEDs When the machine has a fault: 1. The door is locked 2. The door lock indicator flashes quickly (surely > 1 Hz) 3. The control panel LEDs flash, to signal the fault, according to the table fig. 01. The example shown in the fig. 02 (Example Fault F03) below indicates which LEDs flash if the machine has a Fault F03 List of faults, malfunctions and Warnings: F01: Triac Motor short circuit • Check for any water leaks that can reach connector J9 short circuiting the relevant contacts • Check the motor terminal block (a possible problem due to chemical work residuals corroding the contacts that can cause a short circuit) • Replace Card F02: Motor blocked, Tachometrics in Short Circuit/Open • Check motor if blocked • Check the efficiency of J9 connector on the card • Check the tachometric winding checking an ohm resistance reading of 115 - 170 ohm between pins 1 and 2 on wiring connector J9. In case of short circuit, open circuit check the wiring between pins 1 and 2 of J9 relevant to the tachometrics. With a three-phase motor, make sure there is ohm continuity between J9 pins 6 and 7. • Replace motor • Replace card F03: Detected: NTC Open or in Short Circuit or wash heater relay stuck (signalled in presence of full load) • Check efficiency of J8 connector contacts on the card • Check NTC verifying that the ohmic resistance value at room temperature 20°C is approx. 20Kohm on J8 wiring connector pin 11 and 12. • If the measurement is incorrect check J8/NTC wiring continuity. Check the same parameter directly on NCT • Replace NTC • Replace Card. F04: Simultaneous empty and overflow (pressure switch stuck on empty). If the pressure switch contact is stuck on empty the washing machine loads water until reaching the overflow. The drain pump is automatically started by the contact on the overflow pressure switch. • Check the efficiency of J3 connector contacts on the card. • Check pressure switch status checking J3 wiring connector pins: - 2-4 ohm continuity - tub empty - 2-3 ohm continuity - full tub - 2-1 ohm continuity - tub overfilled, at least halfway up door glass • Check wiring of connector J3/pressure switch • Replace pressure switch • Replace card. F05: Detected: Pump Blocked or pressure switch empty not reached • Check the efficiency of J9 connector contacts on the card checking the presence of 220V current between pins 8 and 9. • Check pump: if fed • Check Pump Filter + wall drain • Change Pump • Replace Card. F06: Not on AVD and AVL F07: Detected: No Absorption Wash Heating Element (the fault is only signalled with the pressure switch on empty) • Check the efficiency of J3 connector contacts on the card • Check the continuity of the wash heater on J3 connector pins 5 and 6. The 1800w 230V heating element has a resistance of 25 ohm. • Check the connection of pressure switch J3 connector pins 2 and 3: there must not be ohm continuity (shared with full load). • Check the connection of pressure switch J3 connector pins 2 and 4: there must be ohmic resistance • Replace Heating Element • Replace Pressure Switch • Replace Card. F08: Wash Heater Relay Stuck (signalled in presence of empty) or pressure switch stuck on Full (simultaneously empty and full) • Check the efficiency of J3 connector contact on the card • Check pressure switch status checking J3 wiring connector pins 2 and 4 ohm continuity (it must only be present with tub empty) and pins 2 and 3 ohm continuity (it must only be present with water in the drum) and pins 2 and 1 ohm continuity (it must only be present with water in the tub above normal level, at least halfway up door glass). • Check wiring J3/pressure switch • Check connection of heating element J3 connector pins 5 and 6. • Replace pressure switch • Replace Card F09: Detected: Machine Setup Error (eeprom error) • In case of production card with eeprom soldered: replace card and eeprom • In case of replacement of eeprom and card, check the correct housing of eeprom on card base. F10: No full and empty signal • Check the efficiency of J3 connector contacts on the card • Check pressure switch status checking J3 wiring connector pins: - 2-4 ohm continuity - tub empty - 2-3 ohm continuity - full tub - 2-1 ohm continuity - tub overfilled, at least halfway up door glass • Check wiring of connector J3/Pressure switch • Replace Pressure Switch • Replace Card. F11: Detected: No Pump Feedback (Drain pump disconnected or winding broken) • Check the efficiency of J9 connector contacts on the card • Check continuity of the Pump on J15 connector pins 1 and 2 (in case of washing machine with Easy Door function) or on J9 connector pins 8 and 9 (in case of conventional door lock), checking resistive value equal to 170 ohm. • Check wiring of connector J15 (or J9)/Pump • Replace Pump • Replace Card. F12: No Communication Display Card/LED-Main Card • Check the efficiency of contacts on card of J11 connector • Check the continuity of J11 connector-display card 5-pin connector • Replace Main Card • Replace Display Card/LED. F17: Door lock unfed/open (with Easy Door) • Check the presence of 230V mains power on J4 wiring connector inserted on board between pins 3 and 4, (not present with machine on standby) the presence of power from 230V door lock between pins 3 and 5 • Check the ohm continuity of door microswitch (with door closed on and off) on J4 connector inserted on the board between pins 1 and 2 • Check continuity of J4/door lock wiring • Check door hooking • Replace door lock • Replace card. F17: Door lock unfed/open (conventional door lock, not Easy Door) • Check the presence of 230V mains power onJ4 wiring connector inserted on board between pins 2 and 3, (not present with machine on standby) the presence of power from 230V door lock between pins 3 and 1 • Check door hooking • Replace door lock. • Replace card F18: DSP (Digital Signal Processor) / microprocessor error • Replace card