TSI Instruments PRESSURA 8630-PM, Operation And Service Manual

Page: 41 / 49

Technical Section 35
Symptom Possible Cause Corrective Action
Key switch in
neutral but
alarms still
function.
Key switch is not
selected in ROOM
MODE menu item.
Key switch is
defective.
Change ROOM MODE to key switch.
Replace key switch (unlikely cause of problem).
DIM does not
respond to RS-
485
communications. Network protocol
is incorrect.
Incorrect network
address.
Incompatible
software.
Go into INTERFACE menu, NET PROTOCOL item. The
protocol must match host system. Select correct
interface.
The network address at the building automation system
and at the DIM must match. The network address must
be unique for each DIM.
Data sent to DIM may be in form that the PresSura
controller cannot recognize.
Red alarm light is
on, alarm is
sounding.
Room pressure is
below low alarm
pressure / Room
pressure is above
high alarm
pressure.
Change room balance or change alarm values.
Alarms don’t turn
off after returning
to normal
operation (green
and red lights are
on).
Alarm is set for
latched operation
(see
ALARM
RESET ).
Set ALARM RESET to unlatch