1 689 975 233 2018-05-08| Robert Bosch GmbH
Trouble-shooting | EPS 708 | 81 en
9. Trouble-shooting
9.1 Trouble-shooting table
Effect Cause Remedy Special notes
No display on operator
unit
Monitor and/or PC not connected
or switched on.
Check that both devices are con-
nected and switched on.
PC-monitor connecting cable faul-
ty or not connected
Connect/replace
Faulty PC/monitor Replace
Calibrating oil too hot Electric fuel pump EKP3/M8 faul-
ty
Replace electric fuel pump EKP3/
M8 (see section 6.15)
Chiller pump does not start Reset chiller. To do so, simultane-
ously press the two "Clear" but-
tons on the chiller control panel
for approx. 5 s.
Remove, open and clean pump.
Error: ID3 tP "Pump heat protec-
tion alarm"
Too little cooling water in chiller Bleed and fill chiller
Faulty chiller Replace chiller (see section 6.7) A second person or suitable lif-
ting gear is required
Fault in water inlet Check water inlet Only applies to test benches wit-
hout chiller
No or too low calibrating
oil delivery
Electric fuel pump EKP1/M6 or
EKP2/M7 faulty
Replace electric fuel pump EKP1/
M6 or EKP2/M7
(see section 6.15)
Continuous delivery of ca-
librating oil
Electric fuel pump EKP1/M6 or
EKP2/M7 has a short-circuit to
ground
Electric fuel pump EKP1/M6 or
EKP2/M7 faulty
Check whether electric fuel pump
EKP1/M6 or EKP2/M7 has a
short-circuit to ground.
Replace electric fuel pump EKP1/
M6 or EKP2/M7
(see section 6.15)
Test does not start Normal state not active Go through checklist for normal
operation (see section 5)
Protective hood not open yet Open and close protective
hood 1x
Faulty motor Replace motor (see section 6.21) A second person is required for
assistance
No or too low quantities
are displayed
Plug not inserted or not inserted
correctly on DRV of high-pressu-
re rail.
Check plug connections on all
three DRVs of the high-pressure
rail and insert correctly.
Incorrect current calibration va-
lues
Check calibration values for PCB
A3 (see section 6.1.3)
Quantity displayed is too
large
Incorrect current calibration va-
lues
Check calibration values for PCB
A3 (see section 6.1.3)
Protective hood lowers
by itself
Faulty pneumatic spring Replace pneumatic spring
(see section 6.18)
A second person and a support is
required
Hoses become detached
from the control valve
block inlet
Clogged pressure control valves Clean pressure control valves in
an ultrasonic bath, or replace.
See section 6.37 for removal and
installation.
Return quantity too low Clogged pressure control valves Clean pressure control valves in
an ultrasonic bath, or replace.
See section 6.37 for removal and
installation.
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