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Service Main Control Board Set-Up
Replacement of main control board on AZ95 Zonelines:
1. Disconnect power and access main control board.
2. Disconnect all connections on the original board.
3. Remove original board and install the new board.
4. Reconnect all connections.
5. Use the chart below to set the "dip-switches" to correspond with the model number. If unsure of
features check nomenclature on the next page.
6. Reassemble and re-apply power.
7. When the unit is powered on after replacing the board, the display will show "P1".
8. Press the "Aux" button to save and exit, then verify proper operation.
NOTE: If all the switches are OFF as shown, it would be programmed as an AZ95H15D (230V) without
a make-up air module, heat pipe, or outlet air thermistor.
Switch
S501-1
ON: Air Conditioner
OFF: Heat Pump
Switch
S501-4
ON: Make up air module equipped
Model
Not Used
9K BTU
12K BTU
18K BTU
Switch
S502-1
ON: Heat pipe equipped
– 23 –
Dip Switch
S501-2 S501-3
Off
Off
Off
On
On
Off
On
ON
Switch
S502-3 and S502-4
Not used
Switch
S502-2
ON: All models. Outlet Air
Thermistor equipped.
(Continued next page)
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