Carrier Connect 33CONNECTSTAT43 - Troubleshooting and Maintenance; Output Diagnostics and Faults

Troubleshooting
33CONNECTSTAT43 ©2022 Carrier.
Installation Guide All rights reserved.
37
If the display does not turn on:
1 Check terminals R and C on the thermostat base.
2 Verify power is 24 Vac +/-10%.
3 Verify that the green LED on the base is flashing at 1 Hz.
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
Y1
Y2
W1
W2
G
Y3
*Rev Val=0
*Rev Val=B
Fan Only
Off
Off
Off
Off
On
Off
X
X
Cool 1 (A/C)
On
Off
Off
Off
On
Off
X
X
Cool 2 (A/C)
On
On
Off
Off
On
Off
X
X
Cool 3 (A/C)
On
On
Off
Off
On
On
X
X
Cool 1 (Heat Pump)
On
Off
Off
Off
On
X
On
Off
Cool 2 (Heat Pump)
On
On
Off
Off
On
X
On
Off
Dehumidify
Off
Off
Off
Off
On
X
X
X
Cool 1 and
Dehumidify
On
Off
Off
Off
On
X
X
X
Cool 2 and
Dehumidify
On
On
Off
Off
On
X
X
X
Heat 1 (A/C)
Off
Off
On
Off
On
X
X
X
Heat 2 (A/C)
Off
Off
On
On
On
X
X
X
Heat 1 (Heat
Pump)
On
Off
Off
Off
On
X
Off
On
Heat 2 (Heat
Pump)
On
On
Off
Off
On
X
Off
On
Heat 3 (HP
On
On
On
On
On
X
Off
On
Troubleshooting