SHEVS Control Centre RWZ 1 b
9
5
Detection of fault / troubleshooting
5.1
General information
Occurrence of malfunction is indicated by flashing of the indicator
s
in the Control Centre and in the main
alarm points. With the help of the service display, the cause can be localized (see 5.2).
●
The following are detected as
malfunctions
:
−
Accumulator or mains failure, accumulator polarity reversed
−
Failure of the fuses F1 to F3
−
Wire-break or short-circuit of signal lines
−
Wire-break or short-circuit of the actuator supply line (unbranched common line)
−
Maintenance is overdue
●
Notify maintenance company in case of malfunction.
●
Spare material:
In the Control Centre, there is a bag of spare fuses and resistors.
●
Calibration of the signal lines:
After clearing a persistent malfunction, the signal lines are calibrated auto-
matically. During this the status light
s
flickers for approximately 15
s. If status light
s
is permanently lit,
there is a malfunction in a signal line.
Short malfunctions (< 10 minutes) do not lead to activating of calibration (e.g. brief removal of a detector for
testing the malfunction detection during maintenance work).
●
Memory of the service display:
If there is no pending alarm or malfunction, the memory content may be dis-
played for 1
s by briefly pressing button
Reset
r
(alarm memory) or
Reset
S
(malfunction memory).
●
After troubleshooting, the cause of malfunction will not be shown at the service display any longer. Exception
is the malfunction code [
U
] “accumulator test failed” (also see 4 (Accumulators) and 5.2). This code has to be
reset after troubleshooting by pressing the button
Reset
S
.
5.2
Indications of the service display
●
With the help of the internal service display, operating conditions can be accurately displayed. In normal con-
dition, there is no indication on the service display and the indicator
o
of the Control Centre lights up.
●
For alarm / malfunction, the display is switched on automatically, but switched off after 10
s during mains fail-
ure. In this case, it may be switched on again for 10
s by pressing the button
Reset
S
for 4
s.
i
If there is no alarm / malfunction, the indication of the accumulator charging method can be switched on for
120
s by pressing the button
Reset
S
for 4
s:
[u.]
= U-Charging,
[i.]
= I-Charging,
[ .]
= no charging.
Operating conditions of the Control Centre:
Code Description
Code Description
0
Mains failure or fuse F1 blown
L
Adjustment ventilation position
1
Wire-break accumulators or fuse F2 blown
?
Ventilation position deactivated
2
Actuator output: fuse F3 blown
p
Change-over contact for ventilation detected
3
Actuator output: wire-break / short circuit
q
Alarm through internal thermal sensor
4
Line
T
: alarm
t
Accumulator test active
5
Line
T
: wire-break
U
Accumulator test failed
6
Line
T
: short circuit
Y
Accumulator polarity reversed
7
Line
T
: undefined
-
Memory alarm / malfunction empty
8
Line
t
: alarm
ä
Button
Reset
r
: short circuit
9
Line
t
: wire-break
Ä
Button
Reset
S
: short circuit
A
Line
t
: short circuit
$
Alarm test active
B
Line
t
: undefined
#
Maintenance is due
h
“Malfunction = Alarm” active
!
Microcontroller fault
