Trane VAV VV550 LonTalk, Руководство по установке и эксплуатации

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96 VAV-SVP01A-EN
Troubleshooting
Airflow Failure Procedures
WARNING
Hazardous Service Procedures!
The maintenance and troubleshooting procedures recommended in this section of the manual
could result in exposure to electrical, mechanical or other potential safety hazards. When
possible, disconnect all electrical power including remote disconnect and discharge all energy
storing devices such as capacitors before servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized. When necessary to work with live
electrical components, have a qualified licensed electrician or other individual who has been
trained in handling live electrical components perform these tasks. Failure to follow all of the
recommended safety warnings provided, could result in death or serious injury.
In the event that the air valve is reading position instead of flow or in the event that the measured
flow reads incorrectly, i.e. different from the balance report, properly inspect the following:
• Recalibrate VAV unit by cycling power to unit. This can also be accomplished with Rover service
tool or Tracer Summit. To Calibrate:
Note: Cycling power to the VAV board will automatically cause the unit to calibrate, however,
following the procedure outlined below will provide a more accurate calibration. It is
only necessary to perform this procedure in instances where you are experiencing
incorrect flow readings or if the unit reverts to pressure dependent mode despite being
above 5% and below 110% of cataloged flow and performing a "normal calibration") and
does not correct the problem.
1. Steps for Calibration
• Log on to the VAV VV550 Controller with Rover software.
• Turn the central air handler "off." If this is not possible, Trane recommends pulling the
transducer tubes off during the calibration process to simulate this.
• Select the "calibrate unit" option button.
• Rover software will indicate that calibration is taking place in the diagnostic log.
• When calibration is complete, the box will release to auto. Drive the box open to make sure
that the box is not below 5% of its cataloged CFM. The controller is accurate in reading flow
from 5% to 110% of cataloged CFM.
• Release the box to auto and perform any necessary balancing work. See Rover Help for
balancing details.
• Check to see if flow has been established, If flow not established or inaccurate proceed
to Step 2.
2. The tubing or flow ring is off, reversed, plugged, or has a leak.
• Check with a magnehelic gauge and compare with the delta pressure (DP) chart located on
the VAV box.