MR-VAV-AX Damper Position not responding

Issue

Damper position and Valves do not respond to any commands that are sent to it.

Product Line

TAC I/NET

Environment

MR-VAV-AX

Cause

The SPL setting on the device was set to 1650, this is a default setting but needs to be set to a correct value otherwise  the damper position would not function properly.

Resolution

The chart below can be found in TCON147: ASC-VAV-AX Installation Guide, page 69. This shows what values need to be set for this to function.

Table 12. Shutdown/Purge/Lockout Values

S/P/L Value Mode Cooling Damper Heating Damper Auxiliary Heating
Fan Heat
0 to 99 Normal Modulating Modulating Cycling/On Cycling
100 to 199 Lockout - Heat Modulating Closed Off Off
200 to 299 Lockout - Cool Closed Modulating Cycling/Off Cycling
300 to 399 Lockout - Full Closed Closed Off Off
400 to 599 Purge CHF CHF On Off
600 and over Shutdown Closed Closed Off Off