Bosch EPS 708 - Leds on Frequency Converter (A13)

1 689 975 233 2018-05-08| Robert Bosch GmbH
18 | EPS 708 | Checklist for normal operation en
5.4 LEDs on frequency converter (A13)
i The frequency converter A13 is part of the lubrica-
ting-oil supply unit 1687001931
(special accessory). The following LED description
applies to the frequency converter 1687023774
(see table below). The display on the frequency
converter 1687023552 presents alphanumeric
messages.
Versions Frequency converter
1 687 023 552
Frequency converter
1 687 023 774
Graphic
In
program
From 2011-04 to
2015-10
From 2015-11
RUN FWD REV
POWER
458863-73_Pal
RUN FWD REV
POWER
Range
Time
10s
1
1
2
2b
2a
Fig. 26: LEDs on frequency converter 1 687 023 774 and on time
delay relay (K9)
LED status indications frequency converter
1 687 023 774:
RUN FWD REV Power
On
State
EPS 708 switched off or emergen-
cy-stop pressed
Ready for operation
State before operation of the time
delay relay K9 (see LED 2a flashes
and LED 2b off).
Fault condition after operation of
the time delay relay K9 (LED 2a on
and LED 2b on). Operate delay of
time relay is too short
(<10 seconds).
Reverse direction (REV); wrong pa-
rameter set selected
Warning on stop or error.
1. Switch the EPS 708 off and on.
2. If the error persists, replace the
frequency converter.
Set operate delay from time relay K9
Range
Time
10s
1
Range
Time
458859-18_Pal
10s
1
Fig. 27: Time relay K9
¶ Set the delay time to 10 seconds on the time relay
K9 (see Fig. 27). Set the range to 10s and the fine
adjustment ("Time") to 1.
! The rotary switch for the "Range" must engage per-
ceptibly at 10s. A response delay that is set too low
prevents the frequency inverter from being set to a
ready state.
Test
1. Connect the EPS 708 to the voltage network.
2. Switch on the EPS 708 at the main switch. Observe
the LED "R" (Fig. 26, item 2b) on the time delay relay
K9 immediately after power is switched on. The LED
must light up approx. 10 seconds after power is
switched on. If the LED lights up after approx. one
second, the response delay is set too short and the
frequency inverter cannot be set to the ready state.
The "Run" LED on the frequency inverter A13 does
not light up. In this case, the response delay on the
time delay relay must be set to 10 seconds.