IVT 12PHR-N Service Manual page 42

12PHR-N
Status of Indication
indoor/ by LED1
outdoor on
units outdoor
unit*2
Indoor/
outdoor
units in
complete
shutdown
Indoor/
outdoor
units in
operation
Indoor/
outdoor
units in
operation
Indoor/
outdoor
units in
operation
12PHR-N_S530612PHRN.indd 18
Malfunction No.
displayed on main unit
display section *1
Main Sub-
category category category
19 -0 Indoor unit fan
20 -0 Indoor unit
control PCB
29 -0 Panel
-1
88 Control and
display PCB
Content of diagnosis
Main Sub-category
Indoor unit fan (1) Check the indoor
error fan motor for proper
rotating operation.
(Check fan lock.)
(2) Check the lead
wire of the indoor fan
motor for opencircuit.
(3) Check CN3 of the
indoor unit fan motor
for secure installation.
(4) No abnormality
found in above
inspections (1) through
(3).
EEPROM data (EEPROM read data
error error)
Panel open error (1) Caught of panel
hook
Panel close error (2) Limit switch
breakdown
Communication (1) Check for
error disconnected
connector between
control PCB and
display PCB, and
open-circuit in lead
wires.
(2) Check that control
PCB outputs signals
correctly.
3-18
Inspection Remedy
location/method
(1) Replace the indoor
fan motor.
(2) Replace the indoor
fan motor.
(3) Correct the
installation of CN3 of
the indoor fan motor.
(4) Replace the indoor
unit control PWB.
Replace the indoor unit
control PWB.
(1) Replace or
adjustment of the
panel.
(2) Replace the limit
switch.
(1) Insert connectors
correctly, or replace
control PWB.
(2) Replace control
PWB.
2013/8/7 15:42:17