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9 • Troubleshooting
Art.-Nr.: 80116-271
04.06
C 63 Operating voltage +24 V
incorrect.
Check operating voltages.
C 64 Operating voltage –5 V
incorrect.
Check operating voltages.
C 70 Relay configuration insuffi-
cient.
Check IIF components
(ME,BE,MF).
Check relay (TP relay)
C 71 At least 1 relay is signaled
as closed although all
should be open.
Check relay (TP relay).
C 72 At least 1 relay is signaled
as open although all should
be closed.
Check relay (TP relay).
C 75 IIF signals invalid instru-
ment number.
Replace IIF.
C 7D System error: CRC error in
program memory.
Replace or reprogram
CPU
+ sensors.
C 7E System error: EEPROM not
ready to read.
Replace CPU + sensors.
C 7F System error: Multitasking. Replace CPU + sensors.
C 81 System error: CAN protocol
length incorrect.
Replace control panel.
C 82 System error: SIO protocol
length incorrect.
Replace IIF.
C 83 System error: IIF has not
responded at proper time.
Replace IIF.
C 84 Short circuit between AE
and NE.
Information.
C 91 Redundancy error: Current
at NESSY is greater than at
CPU
+ sensors.
Check calibration, replace
NESSY.
C 92 Redundancy error: Power
supply unit current available
but no corresponding HF
current.
Check calibration.
Check power supply unit
(TP power supply unit).
Recognizing module: C = CPU + Sensors
Recog-
nizing
module
Error
code
Additional infor-
mation
Description Remedy
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