Input Test; Calibrate Air Flow - Bosch ACS 753 Repair Instructions

ACS 753, ACS 763, ACS 863 Service Manual
OUTPUT TEST
Tank liquid solenoid S22
Fan
Vacuum Pump
Compressor
Beacon
Alert Beeper
3. As the tests are highlighted, select
ON/OFF icon. The state will change from 0
to 1. There should be a click heard as the
solenoids are energized, the motors of the
fan, vacuum pump, and compressor should
start, the beacon, if installed will flash once,
and the beeper will sound.
4. When the test is complete, select BACK
icon to return to the Service Menu.

Input Test

The input test displays the current state of
the measurable parts of the unit such as the
amount of refrigerant, temperatures, and the
various pressures present within the unit. The
values shown are absolute and indicate what is
happening within the unit at any given moment
during operation. The values are observable
only and cannot be changed or deleted. They
can indicate whether a sensor or device is
operating within the required limits for proper
unit operation.
1. From the Service Menu, scroll to Input Test.
2. Select OK icon. The following displays:
Placeholders X and Y represent numbers
displayed during this test. A list of the sensors
and devices and what the values represent
follows:
Robert Bosch GmbH
Diagnostics and Testing
INPUT TEST
Sensor or Value
Device Format
ISV Weight X.XXXYY ISV Weight
PAG Weight X.XXXYY PAG Weight
POE Weight X.XXXYY POE Weight
Dye Weight X.XXXYY Dye Weight
Drain Weight X.XXXYY Drain Weight
LS Press X.XYYY Low-Side Pressure
AC Press X.XYYY Accumulator
ISV Press X.XYYY ISV Pressure
ISV Temp
Amb Temp
HP Sw
Overfill
Air Flow XXXXrpm Fan Air Flow
3. Scroll through the sensors or devices to
observe their values. When finished, select
BACK icon to return to the Service Menu.
Calibrate air flow
The air flow inside the unit must be present at
the correct volume to make sure enough air
is present to prevent the buildup of refrigerant
and to keep the compressor temperature below
its upper limit.
1. From the Service Menu, scroll to Calibrate
air flow.
2. Select OK icon. The following displays:
3. Check :
• Unit is with covers.
• Fun is clean and running.
4. Select OK icon, and wait unit is performing
calibration automatically.
33
Property
Pressure
X.X Y ISV Temperature
0
X.X Y Ambient Temperature
0
X High-Pressure Switch
X ISV Liquid Quantity
SP00D00609 2018-03-26