H9" Outdoor Unit: Malfunction Of Thermistor (R1T) For Outdoor Air - Daikin ALTHERMA HT ERSQ 011 AA Service Manual

Troubleshooting by Indication on the Remote Controller
3.25 "H9 " Outdoor Unit: Malfunction of Thermistor (R1T) for
Outdoor Air
H9
Remote Control
Display
Applicable Models ER*Q 011~016*
Method of
Malfunction is detected from the temperature detected by the outdoor air thermistor.
Malfunction
Detection
Malfunction When the outside air temperature thermistor has short circuit or open circuit.
Decision Conditions
 Defect of thermistor (R1T) for outdoor air
Supposed Causes
 Defect of outdoor unit PC board (A1P)
Troubleshooting
 Refer to "Thermistor Resistance / Temperature Characteristics" table on page 251.
176
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Connector
is connected to X11A
of outdoor PC board
(A1P).
YES
Resistance
is normal when
measured after
disconnecting the thermistor
(R1T) from the outdoor
unit PC board.
(3.5kΩ to
360kΩ)
YES
NO
NO
ESIE09-08A
Connect the connector and turn
on again.
Replace the thermistor (R1T).
Replace outdoor unit PC board
(A1P).
Troubleshooting
(V3070)