Test Button; Dpc-1 Thermostat - York VCH-25A Installation Manual

2 Wiring diagrams
2.4

DPC-1 thermostat

Incident table (green LED)
Green Led flashes
1st Ser‐ 2nd Ser‐ 3rd Ser‐
ies ies ies
1
1, 2 or 3
2
1
2
3
4
4
5
6

2.3.1 Test button

• If the test button is pressed until the green led is activated, certain times are shortened.
• If the test button is pressed until the orange led is activated, any fault that has been detected is reset.
• If the test button is pressed until the red led is activated, the optional accessories and probes
connected to the board are identified.
2.4 DPC-1 thermostat
When a fault occurs and there is communication between the unit and the thermostat, the thermostat
alternately displays the time and the fault produced according to the unit fault table.
It also displays other faults related to the thermostat.
50
Type
1
2 Probes
3
1
Temperature
2
1
2
3 Probes
4
5
1 Thermostat
1
2
Auxiliary heat
3
4
1
2
3 Temperature
4
5
1
2
3
Others
4
5
6
1
Recovery system
2
Description
Incident
Discharge probe open or short circuited
Liquid probe open or short circuited
Suction probe open or short circuited
Repeated defrosting
The discharge temperature is not recovered
Supply probe open or short circuited
Return probe open or short circuited
Outdoor probe open or short circuited
Water probe open or short circuited
Fault in the enthalpy probes
Signal Y1 without signal G
Heating element thermal switch 1
Heating element thermal switch 2
Heating element thermal switch 3
Heating element thermal switch 4
The water coil temperature is not recovered
Outdoor temperature too low
Water coil performing antifreeze operation
Supply temperature above 55 °C
Supply temperature < 25 °C with gas
Defrost cycle
There is at least one accessory not found
Air quality demand
Dirty filters
Presence sensor is unoccupied
Suction temperature < 0 °C, economiser
Energy recovery wheel motor trip switch
Energy recovery fan motor trip switch