Steffes HPB22 Troubleshooting Guide - Manual (Page 9)

Discharge Air Check Out Procedure Continued…
Page 7
15. Energize the control circuit and check the #4 yellow LED light on the interface board. It should remain on
(indicates the damper is satisfied), and there should be 24 VAC between the CW terminal and the COM terminal on
the damper motor.
16. If any of the voltage tests performed in this check-out procedure do not yield the correct results, check connections
from the booster’s interface board to the air discharge sensor.
17. If all systems check-out, de-energize all circuits and reconnect all wires, remove all jumpers, and reassemble the
booster by reversing the disassembly procedure.
18. Restore power to the booster.
Consult the factory with questions or if assistance is required with replacing the melt link
or checking any the systems described in this procedure.
THIS PROCEDURE MUST BE PERFORMED BY A QUALIFIED ELECTRICIAN