CM2N3204E / 05.2001
Siemens Building Technologies
8/20
Landis & Staefa Division
The RWI65.02 is able to acquire and handle eight fault status signals from plant
elements and statuses. When the front door is closed, the signals are shown in lines 9
and 10 of the display as follows:
I,II
E6
E4
E1
E2
E5
B9
E3
∆
p
10
9
A 0 b 0
3204Z01
1 2 0
1
2
3
4
6
5
7
8
1
Supervision of risk of frost (signal input B9)
Display: 0 = normal, "A" or "b" = frost alarm
2
Supervision of air flow (signal input E2)
Display: 0 = normal, 1 = start phase, "A" or "b" = faulty flow
3
Overload of chiller or chilled water circulator (signal input E4)
Display: 0 = Q13 / Q24 cooling deactivated, 1 = Q13 / Q24 cooling activated,
"A" or "b" = cooling at fault
4
Freely available, e.g. for filter supervision (signal input E6)
Display: 0 = normal, 1 = start phase, "A" or "b" = fault at E6
5
Overload / overtemperature at hot water circulator or electric heater battery (signal input E3)
Display: 0 = Q13/Q14 heating deactivated, 1 = Q13/Q14 heating activated,
"A" or "b" = pump or electric heater battery at fault
6
Overload of fan (signal input E5)
Display: 0 = Q33 / Q34 / Q44 fans deactivated, 1 = Q33 / Q34 fan speed I activated,
2 = Q33/Q44 fan speed II activated, "A" or "b" = fan at fault
7 Supervision of fire/smoke (signal input E1)
Display: 0 = normal, "A" or "b" = fire/smoke alarm
8 Heat recovery equipment efficiency supervision (signal input Z)
display: no pointer = normal, visible pointer = efficiency is below the set alarm threshold.
Depending on the priority, fault status signals are indicated by a flashing "A" or "b"
in the display (with efficiency supervision using pointer) and by a flashing red LED
located on the acknowledge button on the unit front. Depending on the priority coding of
contact output F91 ("A" and "b" or "A" or "b"), the fault status signal can also be passed
on to F91 as a common fault status signal.
For each status input, the priority of the fault status signal ("A" or "b") can be selected.
Each of the status inputs E1 through E6 can be matched to the type of contact of the
respective signal element (N.O. or N.C. contact).
For status inputs E2 and E6, alarm delays to prevent false alarms are also available.
Any fault displayed can be acknowledged from the acknowledgment button on the unit
front. When a fault is acknowledged, the priority display changes from flashing to steady
and the centralized fault status signal at centralized alarm output F91 is cancelled.
The display of a priority "b" fault status signal goes out when the signal is no longer
present at the fault status signal input. When no other fault status signal is present at
the fault status signal inputs, the display in the acknowledgment button changes from
red to green.
The fault status signal indications (display and acknowledgment button) for a priority "A"
fault can be cancelled by pushing the acknowledgment button again, as long as no
other fault status signals with priority "A" are present.
For the effects of the fault status signals at the outputs of the RWI65.02, refer to the
function flow diagrams on the last page of this data sheet.
Fault status signals and
signalling
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Legend
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Acknowledging the fault
status signal
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