9 | 028-0229-05
November 2015
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:
Frost ON
Indicates that the heating is energized by the low limit frost protection
room temperature setpoint 5.6 °C ( 42 °F )
SetClock
Indicates that the clock needs to be reset. There has been a power failure
which has lasted longer than 6 hours
Service
Indicates that there is a service alarm as per one of the configurable digital
input ( DI1 or DI2 )
Filter
Indicates that the filters are dirty as per one of the configurable digital input
( DI1 or DI2 )
Fan lock
Indicates that the heating and cooling action are locked out due to a
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
operation
Heatpump models
VT76xxH
Multistage and
single stage models
VT7600A, VT7652A,
VT7600B & VT7652B
Multistage
economizer models
VT7605B & VT7656B
Fan LED
on
When G Fan terminal
operates
When G Fan terminal
operates
When G Fan terminal
operates
Heating
LED on
When Y1 and / or W1
terminal(s) operate in
heating mode
When W1 terminal
operate in heating
mode
When W1 terminal
operate in heating
mode
Cooling
LED on
When Y1 terminal
operate in cooling
mode
When Y1 terminal
operate in cooling
mode
When Y1 terminal
operate in cooling
mode and or
economizer output is
in function
