Viconics VT76 7 Series Installation Manual page 9

Alarms

If alarms are detected, they will automatically be displayed at the end of the status
display scroll.

During an alarm message display, the back lit screen will light up at the same time as
the message and shut off during the rest of the status display.

Two alarms maximum can appear at any given time.

The priority for the alarms is as follows:
Indicates that the heating is energized by the low limit frost protection
Frost ON
room temperature setpoint 5.6 °C ( 42 °F )
Indicates that the clock needs to be reset. There has been a power failure
SetClock
which has lasted longer than 6 hours
Indicates that there is a service alarm as per one of the configurable digital
Service
input ( DI1 or DI2 )
Indicates that the filters are dirty as per one of the configurable digital input
Filter
( DI1 or DI2 )
Indicates that the heating and cooling action are locked out due to a
Fan lock
defective fan operation
Three status LEDs on the Room Controller cover are used to indicate the status of
the fan, a call for heat, or a call for cooling.
When any of the fan is ON, the FAN LED will illuminate
When heating is ON, the HEAT LED will illuminate
When cooling is ON, the COOL LED will illuminate
LED Heatpump models
operation
Fan LED When G Fan terminal
on
When Y1 and / or W1
Heating
terminal(s) operate in
LED on
When Y1 terminal
Cooling
operate in cooling
LED on
9 | 028-0229-05
VT76xxH
operates
heating mode
mode
Multistage and
single stage models
VT7600A, VT7652A,
VT7600B & VT7652B
When G Fan terminal
operates
When W1 terminal
operate in heating
mode
When Y1 terminal
operate in cooling
mode
Multistage
economizer models
VT7605B & VT7656B
When G Fan terminal
operates
When W1 terminal
operate in heating
mode
When Y1 terminal
operate in cooling
mode and or
economizer output is
in function
November 2015