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Troubleshooting for Indoor Unit
Si21-205
142
Troubleshooting
5. Troubleshooting for Indoor Unit
5.1
Failure of Indoor Unit PC Board
Remote
Controller
Display
A1
Applicable
Models
FFQ-B & FHQ-BU
Method of
Malfunction
Detection
Check data from E
∑
PROM.
Malfunction
Decision
Conditions
When data could not be correctly received from the E
∑
PROM
E
∑
PROM : Type of nonvolatile memory. Maintains memory contents even when the power
supply is turned off.
Supposed
Causes
Failure of PC board
Troubleshooting
Turn the power supply off once
and then back on.
Normal reset?
YES
NO
Could be outside cause
(noise, etc.)
other than malfunction
Indoor unit PC board
replacement
(S2006)
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 ...