FLK Gas Sampling System - MPIP - Free

SQ250 FLK Gas Sampling System
4.5 Measures to be taken during faults
If a fault occurs and is acquired, the red fault lamp begins to flash quickly. While ever the fault is still present or has not been
acknowledged (fault lamp flashes or is continuously illuminated), the relevant message text can be read in the control cabinet
with the OP3 Operating Panel.
Messag
e
No.
Display text in
operating panel
Cause Effect Remedy
0 Probe Emergency
Stop
Emergency stop button
pressed
Probe does not withdraw by
electric motor, but instead
pneumatically for a fault or
power failure
Important!: Dangerous condition during faults, e.g.
coolant overtemp. cannot withdraw probe, risk of
probe damage. For power failure, probe withdraws
despite emergency-off; reset emergency-off, reset,
insert probe.
1 Control System
Fuse/Voltage fault
Fuse failed
Probe withdraws
(el. +pneum.)
Find cause of fuse failure and remedy, replace fuse,
reset, insert probe
2 Control System ESB
S7 I4.2
Power failure or fuse for
PLC failed
Probe withdraws
pneumatically
For fuse failure, find the cause and rectify it; after
power is restored reset, insert probe
3 Cooling System Flow
< min
Coolant flow too low
(delayed 10s)
Probe withdraws
(electr. + pneum.)
Coolant pump stops
Check the coolant level, top up if required, check for
leakage, manual valves must be open, start pump and
vent, blocked oil filter. Reset, insert probe.
4 Cooling System
Pump fault
Power failure, flow too
low, motor prot. switch
tripped
Probe withdraws
(electr. + pneum)
Find cause of motor prot. switch trip and rectify.
Reset, start pump, insert probe
5 Cooling System Fan
fault
Motor prot. switch
tripped
Probe withdraws
(electr. + pneum.)
Find cause of motor prot. switch trip and rectify.
Reset, start pump, insert probe
6 Cooling System
Level to low
Coolant level too low
Probe withdraws
(electr. + pneum.)
Find cause of coolant lost (leakage) and rectify; switch
off pump, top up coolant, start pump, vent, reset, insert
probe.
Vent again when coolant temperature > 180 °C.
7 Cooling System
Temperature to high
Coolant temperature
to high (default setting
220°C)
Probe withdraws
(electr. + pneum.)
Check coolant level and flow, vent, clean cooler, check
GROW controller with 3-way valve, check limit
setting on temp. controller. No obstacle in cooling air
path? Rectify fault, reset, insert probe, vent again for
coolant temp. > 170 °C
8 Probe retraction
Plugs not OK
I 9.6 for plug monitoring
(Valve combination not
"1")
Probe withdraws
(electr. + pneum.)
Check plug on valve combination for correct seating; if
still not OK, check wiring, reset, insert probe
9 Sampling Gas
Probe/Filter clog.
Still low pressure in
meas. gas line even after
multiple purging
(pressure switch)
Probe does not withdraw.
"Purging" lamp flashes at a
fast rate
Switch off filter heating fuse F1, start purging 3x to
cool down filter, remove filter and clean, clean probe
by undoing rear screw, also check line to condensate
vessel and measuring gas lines, remover filter, ensuring
absolute sealing tightness, switch on fuse F1.
Check for leakage, reset Counter 16, insert probe.
10 Probe retraction ESS
Motor
Either output for
Contactor Insert or
Contactor Withdraw is on
and no feedback or
output not on and
feedback
Probe withdraws
(pneumatically)
Check wiring, especially the limit switches which are
directly latched to the corresponding contactor.
Check outputs and inputs on the PLC:
Output:
Contactor Insert Probe
Input: Feedback
Output: Contactor Withdraw Probe
Input: Feedback
Reset, insert probe
Copyright ® SIEMENS Page 28 04/04