SCPC System • Error messages and error diagnosis
42 CP_SEM_60-03-00.002
5.1.2 Error codes
The following error messages are displayed on the touch screen (both in the normal user interface and
in the Service menu). In the Service menu this is always displayed in the form of an error code,
whereas in the user interface is given partly as symbols (e.g. battery with a line through it) or plain text
messages (e.g. “No COM!”).
Other error codes: Error codes from 20 to 28 originate from the SCP System and are stored only in the
SCPC System. Information on these can be found in the Service Manual for the SCP System. Error code
30 indicates a software error following successful completion of the T1 test (switch-on self-test). The
cause for this could be a fault in the EEPROM on circuit board CPU.
Error code Description Corrective Measures
(please observe sequence)
01 RAM defective – Replace ZAU circuit board
02 EPROM defective, checksum incorrect – Replace EPROM, if the error remains
displayed:
–Replace ZAU circuit board
04 EEPROM write error – Repeat battery test (one occurrence of
this error is tolerable)
–Replace ZAU circuit board if necessary
05 ADC (analog/digital converter) faulty – Replace ZAU circuit board
07 Battery faulty, charge/discharge
interrupted (operation possible without
UPS)
– Check batteries/voltage
– Check battery wiring
– Check fuse S 1 (10 A) on ZNU circuit
board
– Check relay on ZNU circuit board
–Replace ZAU/ZNU circuit boards if
necessary
08
09
Saved data (battery test) incorrect
Saved capacity (battery test) incorrect
– Repeat battery test (one occurrence of
this error is tolerable)
–Replace ZAU circuit board if necessary
Error in T1 test (switch-on self-test)
10 Current sensor faulty (value > 300 mA) – Replace ZNU circuit board; if the error
display persists:
–Replace ZAU circuit board
11 Relay on ZAU circuit board faulty, battery
charging not possible
–Replace ZAU circuit board
12
13
14
Boost voltage 1/ZAU circuit board
Boost voltage 2/ZAU circuit board
Charge indicator faulty
(Symptom: Charge times too long)
–Replace ZAU circuit board
15 Discharge circuit faulty
(Symptom: Battery test not possible)
– Check wiring from backplane (CON 4)
circuit board to discharge resistance
– Check discharge resistance
–Replace ZAU circuit board
17 Saved offset of current sensor (in EEPROM)
incorrect
– Calibrate current sensor
–Replace ZAU circuit board
18 Voltage test delivers different results (2
independent test circuits in the SCPC
System)
– Check mains voltage, if stable and over
190 V (for the 230 V variant):
–Replace ZNU/ZAU circuit boards
19 Charge time too long – Check batteries and wiring
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