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Si21-205
Troubleshooting for Indoor Unit
Troubleshooting
151
5.7
Failure of Capacity Setting
Remote
Controller
Display
AJ
Applicable
Models
FFQ-B, FHQ-BU
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 PC board, 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 PC board’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 PC board
Troubleshooting
Note:
Capacity is factory set in the data IC on the PC board. A capacity setting adaptor that matches
the capacity of the unit is required in the following case.
If the indoor PC board installed at the factory is for some reason changed at the installation site,
the capacity will not be contained in the replacement PC board.
If you connect a capacity setting adaptor to a PC board in which the capacity is memorized, the
capacity setting for the PC board 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 PC board
replacement
Could be outside cause
(noise, etc.) other than
malfunction.
Is the
capacity setting
adaptor plugged into X23A
of the indoor unit PC
board?
NO
(S2579)
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Summary of Contents for Sky Air B-Series R-410A
Page 7: ...Si21 205 vi Table of Contents ...
Page 15: ...Models Si21 205 4 Model Name and Power Supply ...
Page 16: ...Si21 205 Functions 5 Part 2 Functions 1 List of Functions 6 ...
Page 35: ...Wireless Remote Controller Si21 205 24 Remote Controller ...
Page 79: ...Settings Concerning Maintenance Si21 205 68 Field Setting Detail of PCB 2 ...
Page 83: ...Maintenance Mode Setting Si21 205 72 Field Setting ...
Page 239: ...Troubleshooting for Outdoor Unit 50 60 class Si21 205 228 Troubleshooting ...
Page 321: ...Outdoor Unit 50 60 class Si21 205 310 Removal Procedure ...