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Troubleshooting for Indoor Unit
Si21-205
160
Troubleshooting
Troubleshooting
Are
the jumpers
between indoor-indoor
and indoor-outdoor
correctly
connected?
NO
Do the
microcomputer
normal monitors HAP
on all indoor unit PC
boards
blink?
NO
NO
Connect correctly.
Could be incorrect wiring.
Check again.
Connect correctly.
Normal
Set correctly.
Check the power supply
system inside the indoor unit.
Replace the indoor unit
PC board.
Is
the field setting
for pair /
twin system
correct?
Does the
system conduct normal
operation?
YES
YES
YES
YES
NO
YES
Turn the power supply off once,
and back on to restart.
Are the jumpers
between indoor-indoor and
indoor-outdoor correctly
connected?
NO
NO
Is 220 ~ 240
VAC between No.1 and 3
of X2M terminal
(indoor unit)?
YES
YES
Connect the remote controller
correctly.
Is the
remote controller
connected to one or more
indoor units?
NO
YES
Remove the jumper.
Is
the remote
controller wiring jumped
between indoor
units?
NO
(S2735)
NO
Connect correctly.
Is the
number of indoor
units connected this
sytem correct?
YES
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 ...