Reset - Johnson Controls York YKN2Open board Technical Information

In the non-volatile memory the previous 9 faults to occur must be saved. Before saving the fault in the
memory, a check is made to verify whether the previously saved fault is different to the present fault to
be saved. In the event that they are the same, nothing is saved.
The following table shows possible faults:
Flashes
1, 2 or 3
4

5.2.3 Reset

N O T E
[See the operating parameters in the section Rooms, see on page 25].
Incidents, with some exceptions, do not require a reset. They are restored when the condition that
generates them ceases.
A reset is required for the following incidents and this is done in the same way as the alarms:
• Inhibited accessory.
• Repeated defrosting (a reset is also carried out if a defrost is completed normally).
• Electrical heating thermal switch.
Alarms can be reset in the following ways:
• Setting the thermostat to OFF mode, if the communications have been implemented with the
thermostat.
• Pressing the test button on the electronic board.
• Removing and reinstating the power supply to the electronic board.
• Using the communication bus.
It should be noted that a reset of the board by setting the thermostat to OFF cannot be carried out more
than 3 times in one day (AVRNOREARMES).
Meaning
1 Discharge temperature exceeded
High-pressure switch, outdoor fan thermal switch or compressor module
2
thermal switch
3 Low-pressure switch
4 Indoor fan thermal switch
5 Repeated cold start-up or suction temperature ‑25 °C
1 Gas control 1 or heating element 1 fault
2 Gas control 2 or heating element 2 fault
3 Heating element 3 stage fault
4 Heating element 4 stage fault
5 Fault in economiser or HW coil (supply, exterior, return and water probe)
Smoke or high temperature detection, accessories. Supply temperature
6
above 80 °C
Malfunctions 5
Causes 5.2
23