Troubleshooting SiE-05C
318 Troubleshooting PLUS Series
3.22 Excessive Number of Indoor Units
Remote Controller
Display
UU
UU
AA
AA
Supposed Causes The number of connectable indoor units has been exceeded.
Function unit PC board
Troubleshooting
∗The number of indoor units that can be connected to outdoor unit 1 system differs according to outdoor
unit model.
RXY16K, RXY18K, RXY20K: Max. 20 units
RXY24K, 26K, 28K, 30K: 30 units
Refer to Indoor / Outdoor Unit Combinations on P197
YES
YES
The number of connectable
indoor units has been
exceeded. Change the
number of units connected.
Normal
Function unit PC board
replacement
The
total
number of
indoor units connected
to the refrigerant system for
which "UA" is displayed
does not exceed
30 units.
Push and hold the wiring change
button for 5 seconds on the
function unit PC board.
Does malfunction still occur?
NO
NO
(VF156)
SI-05C.BOOK Page 318 Monday, November 6, 2000 4:13 PM
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