Note: All applications use the Imperial unit of
measure.
Note: Warm/Cool Adjust applications also support
sensor only.
Note: These applications only supports the NS8000
series sensors. Older netsensors are no longer
supported.
Troubleshooting equipment controllers
Table 10 provides LED status indicator information for troubleshooting the controller. General troubleshooting provides
some additional troubleshooting information for possible problems.
Note: If you experience short circuits in the 24 VAC power supply causing protective devices such as breakers or
fuses to trip, make sure that the power connections on the controller are not reversed. The most common cause
of this problem is when the 24 VAC power supply on the controller is reversed but not reversed on a connected
secondary device.
LED status and states
Table 10: Status LEDs and description of LED states
LED label LED color Normal state Descriptions of LED states
POWER Green On Steady Off Steady = No power
On Steady = Power is supplied by primary voltage
FAULT Red Off Steady 2 blinks followed by long pause = Controller powered on in default state.
For more information about this default state, see Input and output wiring
validation .
Blink - 2 Hz = Download or startup in progress, not ready for normal
operation, SA Bus devices offline (such as netsensors)
Rapid blink = SA Bus communications issue
Off Steady = No faults
On Steady = Device fault or no application loaded
FC BUS (CVM
models)
Green Blink - 2 Hz Blink - 2 Hz = Data transmission (normal communication)
Off Steady = No data transmission (auto baud in progress)
On Steady = communication lost, waiting to join communication bus
SA BUS Green Blink - 2 Hz Blink - 2 Hz = Data transmission (normal communication)
Off Steady = No data transmission (N/A - auto baud not supported)
On Steady = Communication lost; waiting to join communication bus
FC EOL (CVM
models)
Amber Off (except on
terminating devices)
On Steady = EOL is active
Off Steady = EOL is not active
ETH-1 (CVE
models)
Green Off Off Steady = ETH-1 is not connected
Blinking = ETH-1 connected and communicating
ETH-2 (CVE
models)
Green Off Off Steady = ETH-2 is not connected
Blinking = ETH-2 connected and communicating
FAULT
and
SA BUS
Green
Red
Both blink six times in sequence = no valid firmware on the device
F4-CV Series VAV Terminal Equipment Controllers Installation Guide 17
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