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Troubleshooting
If the display does not turn on:
Check terminals R and C on the thermostat base.
1
Verify power is 24 Vac +/-10%.
2
Verify that the green LED on the base is flashing at 1 Hz.
3
NOTE If the green LED is not flashing and you do have 24 Vac on terminals R and C, you need to replace the
thermostat.
Outputs based on demand and configuration
Demands Stages
Fan Only
Cool 1 (A/C)
Cool 2 (A/C)
Cool 3 (A/C)
Cool 1 (Heat Pump) On
Cool 2 (Heat Pump) On
Dehumidify
Cool 1 and
Dehumidify
Cool 2 and
Dehumidify
Heat 1 (A/C)
Heat 2 (A/C)
Heat 1 (Heat
Pump)
Heat 2 (Heat
Pump)
Heat 3 (HP
33CONNECTSTAT43
Installation Guide
Y1
Y2
W1
Off
Off
Off
On
Off
Off
On
On
Off
On
On
Off
Off
Off
On
Off
Off
Off
Off
On
Off
Off
On
On
Off
Off
Off
On
Off
Off
On
On
Off
Off
On
On
Off
On
On
On
W2
G
Y3
Off
On
Off
Off
On
Off
Off
On
Off
Off
On
On
Off
On
X
Off
On
X
Off
On
X
Off
On
X
Off
On
X
Off
On
X
On
On
X
Off
On
X
Off
On
X
On
On
X
37
Troubleshooting
*Rev Val=0 *Rev Val=B
X
X
X
X
X
X
X
X
On
Off
On
Off
X
X
X
X
X
X
X
X
X
X
Off
On
Off
On
Off
On
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