![background image](http://html1.mh-extra.com/html/daikin/ftk25jv1nb9/ftk25jv1nb9_service-manual_2459333098.webp)
Si04-115
Check
Service Diagnosis
89
For the models whose thermistor is directly equipped on the printed circuit board;
6.1.4
Installation Condition Check
Check No.6
"
Remove the signal receiver and the display printed circuit board
(disconnect the connector too), and then measure ohm by an ohmmeter
at the both ends.
"
Electric resistance cannot be precisely measured when a wire harness is
connected directly to a printed circuit board instead of using a connector.
When error display reappears, replace the PCB.
"
The relation between temperature and resistance is in common with the
existing models.
R1T
Tester
(R1963)
Installation condition check
Normal
Change the position of the air
discharge grille or the
installation location.
Change the position of the air
discharge grille or the
installation location.
Clean the heat exchanger.
Change the installation location
or direction.
Check the outside air
temperature (temperature of air
taken in by the outdoor unit).
(The outside air temperature
shall be 43˚C or lower.)
Check
the allowable
dimensions of the air suction
and discharge
area.
Is
the air flow
blocked by obstacles or
winds blowing in the
opposite direction?
(R1964)
Abnormal
YES
YES
YES
Does
the discharged
air from other outdoor
unit cause an increase of
the suction air
temperature?
NO
NO
NO
Is the heat exchanger
very dirty?
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.