Troubleshooting
VAV Zone II Controllers
CARRIER CORPORATION ©2019
Installation and Start-up Guide
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68
To clean the flow sensor
You can use a can of compressed air to clean the sensors while the controller is installed or on a repair bench.
1
Disconnect the
High
and
Low
flow sensor tubes.
2
Insert the compressed air straw 1/4" into the controller's
High
connector.
WARNING
The compressed air can MUST be upright. It will damage the flow sensors by producing ice
crystals if the can is on its side.
3
Press the air can's trigger twice for no more than 2 seconds each time.
4
Reconnect tubing to the
High
and
Low
flow sensor tubes.
Summary of Contents for VAV Zone II
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