Viconics VT7600 Installation Guide (Current Release 5000 Series PIR Ready) - Manual (Page 36)

36 | PIR Ready VT7600 Series-Installation Guide
Wiring error
1. Start the Fan by forcing the Fan ON
mode
2. Put a jumper across terminals RC & Y1.
The cooling should come ON. If it does
not, verify wiring
The Terminal
Equipment
Controller will not
turn on the fan
Wrong mode selected 1. Start the Fan by forcing the Fan ON
mode
2. Put a jumper across terminals RC & G.
The fan should come ON. If it does not,
verify wiring
Wiring error
Digital display
shows missing
digits or erratic
segments
Defective display Replace Terminal Equipment Controller
Heat pump models
Symptom Possible Cause Corrective Action
Auxiliary heat
does not operate
Wrong mode selected Select emergency heat mode
Terminal Equipment
Controller in Unoccupied
mode
Select Occupied Hold in Schedule hold or
Override to force the Terminal Equipment
Controller Occupied heating setpoint
Anticycle delay active
Wait, the anticycling period will end and
the equipment will start
Heating setpoint is
satisfied
Raise the Heating setpoint
High Balance point
attained
1. Mode is locked out based on outside
air temperature
2. Change configuration parameter High
BP to value 90 °F ( 32 °C ) to by-pass
lockout
Heating lockout attained
1. Mode is locked out based on outside
air temperature
2. Change configuration parameter H
Lock to value 120 °F ( 49 °C ) to by-
pass lockout
Wiring error
1. Start the Fan by forcing the Fan ON
mode
2. Put a jumper across terminals RH &
W1. The heating should come ON. If it
does not, verify wiring and check if a
jumper is required between RC & RH
Heat pump does
not operate in
heating mode
Wrong mode selected Select heating mode