Riello Array AR 3000, Installation And Operation Manual

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SHUTDOWN
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APPENDIX
201 CC_LOSS_BOILER_COMM
Cascade System: Leading
boiler lost communication
with one of the depending
boilers
a- Check interconnecting
wiring between boilers.
b- Make sure all boilers are
powered on.
c- Make sure that Parameter
167 set to proper number of
boilers.
d- Whichever boiler(s) loses
communication with the
Master Boiler will enter boiler
level emergency mode.
e- Check the position of
the S1 switches on the
managing boiler (on) and on
the dependent boiler (off)
to make sure they are set
properly.
202 OUTDOOR_WRONG
Outdoor sensor is open or
shorted
203 T_SYSTEM_WRONG
T_System sensor is open or
shorted
a- Check connections of the
boiler mounted sensor.
b- This will cause Module
Emergency Mode to activate
on that particular boiler.
c- Remaining cascade will
continue to operate as
normal.
d- Check the value of the
reading of this sensor on the
info screen.
204 T_CASCADE_WRONG
T_Cascade sensor is open or
shorted
a- Check connections of the
System sensor mounted in
the header.
b- This will cause Boiler level
emergency mode to activate
on all boilers in the cascade.
c- Check the value of the
reading of this sensor on the
info screen.
205 MAX_HIGH_LIMIT_WARNING
Too many physical high
limit test attempts within 24
hours.
In order to check if the control is functioning properly the following readings can be taken:
AL Link
24VDC (with S1 Switch On and open circuit). Voltage is variable while in normal operation depending on data stream.
Pressure Switches
(ie: Gas Pressure, Water Pressure, Flue Pressure, etc) 3.3VDC while circuit is open.
Safety Switch
(High Limit) 24VDC while open
Flow Meter
5VDC at all times