Ua" Communication Error Between Outdoor Unit And Indoor Unit - Daikin ALTHERMA HT ERSQ 011 AA Service Manual

Troubleshooting by Indication on the Remote Controller
3.61 "UA " Communication Error between Outdoor Unit and Indoor
Unit
UA
Remote Control
UA
Display
UA
Applicable Models AII indoor unit models
All outdoor unit models
Method of
Malfunction
Detection
Malfunction
Decision Conditions
 Excess of connected indoor units
Supposed Causes
 Defect of outdoor unit PC board (A1P)
 Mismatching of the type of indoor and outdoor unit.
 Setting of outdoor PC board was not conducted after replacing to spare parts PC board.
Troubleshooting
216
subcode 13
subcode 39
Be sure to turn off power switch before connecting or disconnecting connector,
Caution
otherwise parts may be damaged.
Is the
outdoor PC board
replaced to spare parts
PC board?
NO
Push and hold the RESET
button on the outdoor unit
PC board for 5 seconds.
Does a
malfunction
occur?
YES
Does the type
of indoor and outdoor unit
match?
YES
YES
NO
NO
ESIE09-08A
The outdoor PC board replaced is
wrong, check PC board type.
Normal
Matches the type of indoor and
outdoor unit.
Replace outdoor unit PC board
(A1P).
(V3169)
Troubleshooting