Carrier Connect - Troubleshooting and Faults

Troubleshooting
Carrier Connect™
Wi-Fi Thermostat Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
Installation Guide 38 All rights reserved
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
The following table shows the outputs based on demand and configuration.
Demands Stages
Y1
Y2
W1
W2
G
*3rd
Stage
Cool
*Dehum
*Hum
*Rev
Val=0
*Rev
Val=B
Fan Only
Off
Off
Off
Off
On
Off
X
X
X
X
Cool 1 (A/C)
On
Off
Off
Off
On
Off
X
X
X
X
Cool 2 (A/C)
On
On
Off
Off
On
Off
X
X
X
X
Cool 3 (A/C)
On
On
Off
Off
On
On
X
X
X
X
Cool 1 (Heat Pump)
On
Off
Off
Off
On
X
X
X
On
Off
Cool 2 (Heat Pump)
On
On
Off
Off
On
X
X
X
On
Off
Dehumidify
Off
Off
Off
Off
On
X
On
X
X
X
Cool 1 and Dehumidify
On
On
Off
Off
On
X
On
X
X
X
Cool 2 and Dehumidify
On
Off
Off
Off
On
X
On
X
X
X
Heat 1 (A/C)
Off
Off
On
Off
On
X
X
X
X
X
Heat 2 (A/C)
Off
Off
On
On
On
X
X
X
X
X
Heat 1 (Heat Pump)
On
Off
Off
Off
On
X
X
X
Off
On
Heat 2 (Heat Pump)
On
On
Off
Off
On
X
X
X
Off
On
Heat 3 (HP w/Emerg Ht)
On
On
On
On
On
X
X
X
Off
On
Heat 4 (HP w/Emerg Ht)
On
On
On
On
On
X
X
X
Off
On
Heat 1 and Dehumidify
Off
Off
On
Off
On
X
X
On
X
X
Heat 2 and Dehumidify
Off
Off
On
On
On
X
X
On
X
X
Troubleshooting