Trane ZN. LonWorks control, Руководство пользователя

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32 CNT-SVX13B-E4
Troubleshooting
Probable cause
Unit wiring
Unit configuration
Diagnostic present
Manual output test
Sampling logic
Freeze avoidance
Normal operation
Probable cause
Unit wiring
Unit configuration
Diagnostic present
Manual output test
Freeze avoidance
Normal operation
Explanation
The wiring between the controller outputs and the valve(s) must be present and correct for normal
valve operation.
The controller must be properly configured based on the actual installed end devices and
application. When the unit configuration does not match the actual end devices, the valves may not
work correctly.
A specific list of diagnostic affects valve operation
The controller includes a manual output test sequence you can use to verify output operation and
associated output wiring. However, based on the current step in the test sequence, the valve(s) may
be open.
The controller includes entering water temperature sampling logic which automatically invoked
during 2-pipe and 4-pipe changeover when the entering water temperature is either too cool or too
hot for the desired heating or cooling. Refer to "Entering water temperature sampling function" on
page 9.
When the fan is off with no demand for capacity (0%) and the outdoor air temperature is below the
freeze avoidance setpoint, the controller opens the water valves (100%) to prevent coil freezing. This
includes unoccupied mode when there is no call for capacity or any other time the fan is off. The
controller opens and closes the valves to meet the unit capacity requirements.
The controller opens and closes the valves to meet the unit capacity requirements.
Explanation
The wiring between the controller outputs and the end devices must be present and correct for
normal operation.
The controller must be properly configured based on the actual installed end devices and
application. When the unit configuration does not match the actual end devices, the unit may not
work correctly.
A specific list of diagnostics affect electric heat operation.
The controller includes a manual output test sequence you can use to verify output operation and
associated output wiring. However, based on the current step in the test sequence, the electric
output may be off.
When the fan is off with no demand for capacity (0%) and the outdoor air temperature is below the
freeze avoidance setpoint, the controller disables electric heat output. This includes unoccupied
mode when there is no call for capacity or any other time the fan is off.
The controller energizes the outputs only as needed to meet the unit capacity requirements.
Table 10 - Valves stay open
Table 11 - Electric output does not
energize