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VAV-SVP01A-EN
Troubleshooting
3. Tracer Summit has the fan output disabled
•
Check group, global, and/or Tracer overrides to make sure they are not inhibiting fan
operation.
4. A flow override exists locking out the fan output
•
Check to make sure Tracer or Rover service tool has released fan disable override.
5. If the VAV VV550 Controller is calling in the status menu for the Fan to be on and it is not then
check VV550 Triac output wiring; and Relay output.
•
Override damper open
•
See if fan cycles on
•
Check J8 to TB1-2. Should have 24VAC; if it does not, measure the power input to TB1-
1 24VAC input and TB1-2 (ground) of the VV550 board. The supply voltage should be
between 20 and 28 VAC (24VAC cataloged). However, voltages at either extreme may
result in system instability.
•
Triac can be checked with purchasing a 24VAC light bulb and see if it lights up on call for
fan, and if the light bulb does not light up replace VV550 controller.
•
Move fan relay wires from VV550 and apply 24VAC directly.
•
Fan relay should energize. If it does not energize check wiring. If wiring is OK replace fan
relay.
Notice:
Equipment Damage!
VAV VV550 Controller outputs are switched to ground. Do not jumper 24VAC to J9, J10, or J11
because damage will occur.
6. After all checks have been completed, check motor fan winding integrity and bearing failure.
VAV Parallel Fan 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 fan output is not energizing, properly inspect the following:
1.
Verify the output configuration in the VV550 setup menu.
•
Unit needs to be configured as parallel fan
2. Outputs on the VV550 are configured as normally closed
•
Verify the output configuration in the VV550 setup menu.
Note:
Parallel fan can be enabled by either a differential temperature above the heating
setpoint or CFM flow. See Operation chapter for details
3. Tracer Summit has the fan output disabled
Содержание VAV VV550 LonTalk
Страница 1: ...May 2010 VAV SVP01A EN Installation Operation Programming VAV VV550 LonTalk Controller...
Страница 17: ...VAV SVP01A EN 17 VAV Start Up Check Out Procedure Figure 2 VV550 single duct control diagram...
Страница 18: ...18 VAV SVP01A EN VAV Start Up Check Out Procedure Figure 3 VV550 fan powered control diagram...
Страница 107: ...VAV SVP01A EN 107 Troubleshooting Figure 59 VV550 single duct control diagram...
Страница 108: ...108 VAV SVP01A EN Troubleshooting Figure 60 VV550 fan powered control diagram...
Страница 110: ...110 VAV SVP01A EN Troubleshooting Figure 62 Single duct with three phase voltage electric heat...
Страница 112: ...112 VAV SVP01A EN Troubleshooting Figure 64 SCR PSC fan powered with three phase voltage electric heat...
Страница 114: ...114 VAV SVP01A EN Troubleshooting Figure 66 ECM fan powered with three phase voltage electric heat...
Страница 115: ......