TROUBLESHOOTING
Before servicing the unit, switch power off at the electrical panel to reduce the risk of
electrical shock, fire, or injury.
The 2.5/2.5e WHF has been factory tested. If you have problems with the unit please take a few
minutes to run through the following troubleshooting procedures before calling for assistance.
Symptom: Unit does not start
Possible causes: No power to unit.
Suggestion 1: Check power to the unit and wiring at both the switch and the unit mounted junction box.
Suggestion 2: Check the re-settable circuit breaker on damper enclosure electrical box.
Suggestion 3: If power is verified at the unit, remove all control wiring from the low voltage control side.
Jumper COM (RED) terminal to START (BLK) terminal. Jumper testing must be done with power
supplied to the unit. The unit will not operate if jumper wires are attached to unit prior to supplying
power to the unit. The damper door should open and the fan should start. When the jumper is
removed the fan should stop and the damper should close. If the start/stop sequence checks out then
there is an issue with field wiring to the switch or remote.
Symptom: Damper does not open
Possible causes: No power to damper actuator or damper shaft loose.
Suggestion: Check power to unit and wiring. The actuator (actuator mounted terminal block, not circuit
board) should always have power to terminal 3, and terminal 2 when the fan is running (open damper).
Terminal 1 should be the neutral. Verify that the actuator jaws are closed tight on the damper shaft.
Symptom: Unit does not run on low speed
Possible causes: Wiring issue.
Suggestion: Verify wiring connections to the wall switch and the 120v wires from the control board to
the fan. (shown in
Figure 12
on page 11).
Symptom: Unit does not run on high speed
Possible causes: Wiring issue.
Suggestion: Verify wiring connections to the wall switch and the 120v wires from the control board to
the fan. (shown in
Figure 12
on page 11
).
Symptom: Damper door opens but fan does not start
Possible causes: Wiring issue between fan and damper enclosure.
Suggestion: Verify all wiring connections between fan and damper enclosure electrical box.
If you continue to have issues with the unit, or have questions about the installation and wiring, please
contact AirScape technical support by email at [email protected] or call 1-866-448-4187.
AirScape 2.5/2.5e WHF Installation Manual 02-11 Page
14
