Bosch CLC6101i-W 50 HE Service Manual page 40

Climate Class 6100i / 6000i / 8100i / 8000i
Outdoor
unit
Problem
indica-
symptom
tion
(LED1)
Indoor unit Lighting 17
operates. or
Outdoor OFF
unit
does not
operate.
Indoor unit Lighting 18
operates. or
Outdoor OFF
unit
does not
operate.
Indoor and
outdoor
units
do not
operate.
Indoor and Normal 19
outdoor blinking
units do or
not OFF
operate.
Indoor and Normal 20
outdoor blinking
units do or OFF
not
operate.
Malfunction
No.*
Main Sub
0 Wiring
between
units
0 Wiring
between
units
1
0 Indoor unit
fan
0 Indoor unit
control PWB
Content of diagnosis
Main Sub
Serial opencircuit
Serial short-cir-
cuit
Serial erroneous
wiring
Indoor unit fan
error
EEPROM data
error
4-20
Check point
1) Check the wires between
units.
2) Check voltage between
N and 1 the indoor/out-
door unit terminal boards.
3) Check the outdoor unit
fuse.
4) Check voltages of
15V-0V,12V-0V and 5V-
0V on the PWB.
15V-0V :15V
12V-0V :12V
5V-0V :5V
Check resistance be-
tween IPM terminals.
5) No abnormality found
in above inspections (1)
through (4).
1) Check the wiring be-
tween units.
1) Check the wiring be-
tween units.
1) Check the indoor fan
motor for proper rotating
operation. (Check fan
lock.)
2) Check the lead wire of
the indoor fan motor for
open-circuit.
3) Check connector of the
indoor unit fan motor for
secure installation
4) No abnormality found
in above inspections (1)
through (3).
1) (EEPROM read data
error)
Action
1) Connect stable power
supply. Correct the
wiring.
2) Replace the outdoor
unit control PWB as-
sembly.
3) Replace the fuse/ out-
door unit control PWB
assembly.
4) Replace the outdoor
unit control PWB as-
sembly.
5) Replace the outdoor
unit control PWB board.
1) Correct the wiring.
1) Correct the wiring.
1) Replace the indoor fan
motor.
2) Replace the indoor fan
motor.
3) Correct the installation
of the indoor fan motor
connector.
4) Replace the indoorunit
control PWB
1) Replace the indoor unit
control PWB