Si18-525B
Troubleshooting for SkyAir Indoor Unit
Troubleshooting
349
5.7
Malfunction of Capacity Setting
Remote
Controller
Display
AJ
Applicable
Models
FFQ, FCQ, FBQ, FHQ
Method of
Malfunction
Detection
Capacity is determined according to resistance of the capacity setting adaptor and the memory
inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is
determined.
Malfunction
Decision
Conditions
Operation and:
(1)When the capacity code is not contained in the PCB’s memory, and the capacity setting
adaptor is not connected.
(2)When a capacity that doesn’t exist for that unit is set.
Supposed
Causes
Failure of capacity setting adaptor connection
Failure of indoor unit PCB
Troubleshooting
Note:
Capacity is factory set in the data IC on the PCB. A capacity setting adaptor that matches the
capacity of the unit is required in the following case.
If the indoor PCB installed at the factory is for some reason changed at the installation site, the
capacity will not be contained in the replacement PCB.
If you connect a capacity setting adaptor to a PCB in which the capacity is memorized, the
capacity setting for the PCB will become the capacity setting of the adaptor. (Priority of capacity
setting adaptor)
Turn the power supply off once
and back on.
Is AJ displayed on
the remote controller?
YES
YES
Plug a capacitor setting
adaptor that matches the
capacity of the unit into
X23A. (See note)
Bad contact of capacity
setting adaptor or
disconnected adaptor.
Indoor unit PCB
replacement
Could be outside cause
(noise, etc.) other than
malfunction.
Is the
capacity setting
adaptor plugged into X23A
of the indoor unit
PCB?
NO
(Q0415)
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Summary of Contents for D-Series
Page 1: ...Si18 525B Applied Models Super Multi Plus Cooling only Super Multi Plus Heat Pump D Series ...
Page 33: ...List of Functions Si18 525B 20 List of Functions ...
Page 71: ...Specifications Si18 525B 58 Specifications ...
Page 117: ...Refrigerant Flow for Each Operation Mode Si18 525B 104 Refrigerant Circuit ...
Page 171: ...Indoor Unit SkyAir Models Si18 525B 158 Function ...
Page 207: ...Test Operation and Field Setting for RA Indoor Unit Si18 525B 194 Test Operation ...
Page 336: ...Si18 525B Service Check Function Troubleshooting 323 ...
Page 469: ...Wiring Diagrams Si18 525B 456 Appendix ...
Page 475: ...Si18 525B vi Index ...
