Kemper 686 02 005, Installation And Operating Instructions Manual, Page: 43 / 50

Manual KHS Mini System Control MASTER 40
Error description / Error handling
Status
LED
on Slave
Error Potential cause Measures Impact
Bus error
Fla
she
s
ora
ng
e
(5
pe
r sec.
)
No response from the
SLAVE
Cable break, false installation,
interference fields
Check CAN bus cables
and installation
Faulty SLAVE does not
function
No response from the
SLAVE
SLAVE does not have voltage Restore SLAVE power
supply
Faulty SLAVE does not
function
No response from the
SLAVE
SLAVE with its corresponding serial
number no longer part of the plant
(e.g., after a replacement)
Assign the correct serial
number to the SLAVE or
delete the device from the
system
Faulty SLAVE does not
function
CAN bus line fault Cable break, false installation,
interference fields
Check CAN bus cables
and installation
CAN-BUS and all SLAVEs do
not function.
O
nl
y o
n
Ma
st
er
Fla
she
s
ora
ng
e
(5
pe
r sec.
)
Too many bus
subscribers
CAN-BUS A
More than 31 SLAVEs are connected
to
CAN-BUS A
Rewire or the BUS
subscribers or change the
position of the MASTER in
the bus system.
CAN-BUS A faulty.
Communication and functions
can be impaired.
Too many bus
subscribers
CAN-BUS B
More than 31 SLAVEs are connected
to
CAN-BUS B
Rewire or the BUS
subscribers or change the
position of the MASTER in
the bus system.
CAN-BUS B faulty.
Communication and functions
can be impaired.
Communication error
CAN Bus A
Cable break, false installation,
interference fields
Check CAN Bus A cables
and installation
Affected SLAVEs do not
function
Communication error
CAN Bus B
Cable break, false installation,
interference fields
Check CAN Bus B cables
and installation
Affected SLAVEs do not
function
Table 9.2: Description of warnings / notices
Description of warnings / notices
Status
LED
on Slave
Error Potential cause Measures Impact
Warnings
Fl
a
s
he
s
red
(1
/
s
e
c
.)
Operating cycles exceed
10,000
The VAV on the defective SLAVE has
performed more than 10,000 operating
cycles
Replace VAV bonnet in
accordance with the
maintenance manual and
reset the operating cycles
The warning message cannot
be confirmed. SLAVE
continues to operate normally
No i
nfl
ue
n
c
e
Limit thermal disinfection
exceeded
The monitored temperature has
exceeded the set limit value
Check to see if it needs to
be set otherwise
Entry in journal and optional
message via email
Limit set-point max.
exceeded
The monitored temperature has
exceeded the set limit value
Check to see if it needs to
be set otherwise
Entry in journal and optional
message via email
Limit set-point min.
undercut
The monitored temperature has
undercut the set limit value
Check to see if it needs to
be set otherwise
Entry in journal and optional
message via email
Frost protection limit
undercut
The monitored temperature has
undercut the set limit value
Prevent danger of valves
freezing up
Entry in journal and optional
message via email.
Notes
No
inf
lue
nc
e
Set-point OK Notice that the monitored temperature
is in the target range
No action needed! Entry in journal and optional
message via email
Illu
m
in
at
e
s
green
Control in standby No flushing pending. Control in standby No action needed! No influence
F
las
h
e
s
g
re
e
n
Flushing is running The valve on the involved control is
flushing / is open
No action needed! Entry in journal
F
la
s
he
s
g
ree
n
and
o
ra
n
g
e
in
an
a
lt
er
n
at
in
g
se
q
u
en
ce
o
f
1
sec
Control unit is disabled System control is installed correctly,
however not activated
Activate system control No influence