Daikin SkyAir RZQ200 · 250C7Y1B Service Manual page 148

SiBE26-701
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check connectors for
connection.∗1
Normal?
∗2
YES
Remove thermistor from
outdoor unit PC board,
then measure the
resistance using a tester.
Normal?
∗2
YES
∗1 : H9 : Malfunction of outdoor temperature thermistor system
J3 : Malfunction of discharge pipe thermistor system
J5 : Malfunction of suction pipe thermistor system
J6 : Malfunction of heat exchange thermistor
J9 : Malfunction of thermister circuit at the outlet of subcooloing heat exchanger
See Check No. 6 for "Thermistor temperature/Resistance characteristics".
∗2 : The number of each thermister and the connector
Name
Outdoor air thermistor
Suction pipe thermistor
Discharge pipe thermistor
Heat exchanger thermistor
Subcooling heat exchanger outlet thermistor
NO
NO
Connector
Symbol Connector No.
R1T X18A
R2T X30A
R3T X29A
R4T
X30A
R5T
Diagnosis by Remote Controller
Connect correctly.
Replace the thermistor.
When a set of
integrated thermister
is equipped, replace
it as a set.
Replace the outdoor
unit PC board
(A1P).
RZQ
·
200 250C
Pin No.
—
1-2
—
3-4
5-6
137