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9 • Troubleshooting
80116-276_V24169
2022-01
A/E D CAN error. Reprogram unit (modules)
Load compatible software.
A 10 Underpressure at selected
gas input.
Check the gas supply (tank,
pressure regulator) and hose
connections. If the error per
-
sists, replace the APC 2 con-
troller (pressure sensor)
assembly.
A 11 Overpressure at selected gas
input.
Check the gas supply (tank,
pressure regulator) and hose
connections. If the error per
-
sists, replace the APC 2 con-
troller (pressure sensor)
assembly.
A 12 Caloric and differential pres-
sure sensor do not agree
(wrong gas).
Check the gas supply (type of
gas). If the error persists,
readjust the unit or check the
APC 2 controller, flow sensor
and pneumatic block.
A 13 Differential pressure sensor
measures less than half a
setting (defective?).
Check APC 2 controller con-
nections, flow sensor and
pneumatic block. If the error
occurs again, replace the
assembly.
A/E 21 Undervoltage of a measure-
ment circuit.
Check APC 2 controller or
VEM 2 controller.
A/E 22 Overvoltage of a measure-
ment circuit.
Check APC 2 controller or
VEM 2 controller.
A/E 23 Combination of error mes-
sages A 21 and A 22.
Check APC 2 controller or
VEM 2 controller.
A 30 Input 2 selected with partial
complement.
Check APC 2 controller con-
nections, keyboard PCB and
IIF.
A/E 38 Type detection of socket 1
fails to agree with the stored
value.
Check and save the socket
configuration in the "Version
List" test program. If the error
occurs again, replace the IIF.
Recognizing module: A = APC 2, E = Extension module VEM 2
Recog-
nizing
module
Error
code
Additional informa-
tion
Description Action