Replacement Control Board - Bosch ACS 753 Repair Instructions

Electrical

Replacement Control Board

WARNING: Disconnect the unit from
the power source before beginning
service work. Incorrect use or
connections can cause electrical
shock.
WARNING: Wear safety goggles
when working with refrigerants.
Refrigerants can cause eye injury.
WARNING: Use extreme caution
w h e n d i s c o n n e c t i n g h o s e s .
Pressurized refrigerant may be
present in hoses. Point hoses away
from you and anyone nearby.
NOTE: TANK TARE is a fixed value already
memorized in the main board spare parts.
Instructions
These instructions outline the basic steps to
replace the control board. Refer to Figure 3-6.
Remove Existing Control Board
1. Disconnect unit from the power source.
2. Remove shrouding.
3. Remove the upper right- and left-hand
screws from the control panel, then tilt the
control panel towards the front of the unit.
CBP1
CBP6
CBP3
SP00D00609 2018-03-26
CBJ6
CBP17
P17
P12
P13
P1
P3 P2 P9 P10
CBP2
CBP9
Figure 3-6. Control Board Connector Identification
ACS 753, ACS 763, ACS 863 Service Manual
4. Disconnect all wires from control board
including keypad and display ribbon cables.
5. Remove screws securing control board in
place and remove control board.
Install Replacement Control Board
NOTE: All control boards are shipped from
the factory in the Production Boot Mode.
Service centers must follow these installation
procedures to set the boot mode to Normal.
1. Attach the display and keypad ribbon cables
to the control board.
2. Connect wires as shown in Figure 3-6.
3. Tilt the control panel down and secure with
two screws.
4. Power up the unit. The unit will be in the
Production Test Mode.
5. Check the software version. If necessary,
download the new software and follow the
Install Current Software procedure under
Updating System Software Instruction in the
Diagnostics and Testing section.
6. Access the Service Menu and enter yearly
password.
7. Scroll to the Set Boot Mode option and
enter access code 28768347.
8. If necessary, scroll to Normal and select OK
icon, for normal machine operation.
CBP11
J8
P11
LS1
J2
P19
J3
J7
J1
P8
CBP8
CBP10
66
CBP15
CBP19
CBP18
CBJ1
Robert Bosch GmbH