IVT 12PHR-N - Page 39

3-15
12PHR-N
Status of
indoor/
outdoor
units
Indication
by LED1
on
outdoor
unit*2
Malfunction No.
displayed on main unit
display section *1
Content of diagnosis Inspection
location/method
Remedy
Main
category
Sub-
category
Main
category
Sub-category
Indoor/
outdoor
units in
complete
shutdown
6 times
6 -0 Outdoor unit
DC
DC over current
error
(1) IPM continuity
check
(1) Replace the
outdoor unit control
PWB assembly.
(2) Check the IPM and
heat sink for secure
installation.
(2) Correct the
installation (tighten the
screws).
(3) Check the outdoor
unit fan motor for
proper rotation.
(3) Replace the
outdoor unit fan motor.
(4) No abnormality
found in above
inspections (1) through
(3).
(4) Replace the
outdoor unit control
PWB assembly.
(5) No abnormality
found in above
inspections (1) through
(4).
(5) Replace the
compressor.
-1 IPM pin level error Check the IPM is
attached correctly
to the outdoor unit
control PWB.
Replace the outdoor
unit control PWB
assembly.
Indoor/
outdoor
units in
complete
shutdown
7 times
7 -0 Outdoor unit
AC
AC over current
error
(1) Check the outdoor
unit air outlet for
blockage
(1) Ensure
unobstructed air ow
from the outdoor unit
air outlet.
(2) Check the outdoor
unit fan for proper
rotation.
(2) Check the outdoor
unit fan motor.
-1 AC over current
error in OFF status
(1) IPM continuity
check
(1) Replace the
outdoor unit control
PWB assembly.
-2 AC maximum
current error
(1) Check the outdoor
unit air outlet for
blockage.
(1) Ensure
unobstructed air ow
from the outdoor unit
air outlet.
(2) Check the outdoor
unit fan for proper
rotation.
(1) Check the outdoor
unit fan motor.
-3 AC current
deciency error
(1) Check if there is
an opencircuit in the
secondary winding of
the current transformer
of the outdoor unit
control PWB.
(1) Replace the
outdoor unit control
PWB assembly.
(2) Check if the
refrigerant volume is
abnormally low.
(2) Charge the
specied amount of
refrigerant.
(3) Check if the
refrigerant ows
properly.
(3) Correct refrigerant
clogs. (2-way valve,
3-way valve, pipe,
expansion valve)
12PHR-N_S530612PHRN.indd 15 2013/8/7 15:42:17