1 689 975 140 2013-07-01| Robert Bosch GmbH
Troubleshooting | EPS 807 / 815 | 15
en
5. Troubleshooting
Kurzzeichen Benennung Funktion Besondere Hinweise
Tip switch S2 (UE)
without efficiency
(Interruption
drive-end circle)
230 VAC supply is not available
(measuring on A1_X03 Terminals
LL0 and LL1)
Checking transformer T3,
Safety fuse F11, F8
(measuring on Kl100/101)
Error A2 (AZ module) Using control unit of the measuring system
or AMK control unit Error diagnostics
Keep emergency tip switch
S1.17/18 depressed
Remove emergency stop switch S1
DZE/A5 - Stop
(PCB 1 688 400 009: LED V59
lits and LED V78 blinks
or
PCB 1 688 400 251: LED V29 lits
and LED V23 blinks)
Interpret DZE error message
(Interface A5_X8 - A4_X77 is broken, inter-
face A5_X10 - measuring system is bro-
ken, speed recess is not switched on, po-
sition recess is not kept, unequal running
direction)
A5 / Software is damaged
(PCB 1 688 400 009: LED V59
lits and LED V78 is off
or
PCB 1 688 400 251: LED V29 lits
and LED V23 is off)
Reinstall software for DZE/A5, if not suc-
cessful replace LP
Hardware interruption in the
drive-end circle
Check the following cables:
A2_X25 - A5_X11 (signals ES1 - ES2),
A5_X11 (signals S1.21-S1.22, switch com-
ponent S1.2 of control unit)
Precaution!
If the main switch Q1 is on
these cables lead 230V !
Interruption of the
emergency-off circle
(there is 24 VAC be-
tween A5_X1.3 and
A5_X1.2)
Transformer T2,
Safety fuse F2, F10
Check F10 /engage,
check F2 (F2 is mounted onto the terminal
strip Transformer T2)
If transformer is in good condi-
tion and safety fuses are secure
there is
24 VACbetween Kl160 and
Kl161
Emergency off S1.11-S1.12,
Cable Control unit
Remove emergency switch-off S1 If the switch and cable are in
good condition there is 24VAC
between Kl160 and Kl165
Float switch,
Tank temperature > 70°C
Fill up test oil or let temperature cool
down
In order to correct the mistake
EPS must be switched-on dead
during shutoff on account of
tank >70°C .
There is 24 VAC between Kl160
and 166!
Engine circuit breaker Q2
has activated (Secondary switch
1.13-1.14)
Engage Q2, check the set release current
(1.8A), if necessary check test engine
DZE / Connecting
cable is damaged
Cable A5_X2 - A2_X30/31 is dam-
aged
Check cable /
see Item 7.1
After printing of S2 (UE) there
is approx. 24 VDC on A2_X31
(UE and 0V)!
If cable is in good condition.:
Check A5 (LP DZE)
see Item 7.2
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