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40
3P362438-9N
English
Malfunction code
Contents
Solution
Main
code
Sub code
Master/sub 1/sub 2
LC
14/15/16
Transmission trouble.
A4P (X6A)-A1P (X25A)
Check connection.
19/20/21
Transmission trouble.
A5P (X3A)-A4P (X41A)
Check connection.
24/25/26
Transmission trouble.
A5P (X4A)-A6P (X3A)
Check connection.
33/34/35
Transmission trouble.
A7P (X2A)-A1P (X20A)
Check connection.
P1
01/02/03
Unbalanced power supply voltage.
Check if power supply is within the range.
U2
01/08/11
Voltage power shortage or open power supply phase.
•
Check if power supply is within the range.
•
Correct phase order.
02/09/12
Reversed or open power supply phase.
•
Check if power supply is within the range.
•
Correct phase order.
U3
03
System test run not yet executed (system operation
not possible).
Execute system test run.
04
An error occurred during the test run.
Check the piping and re-execute the test run.
05
Test run aborted.
Re-execute the test run.
06
07
Test run aborted due to communication issues.
Check the communication wires and re-execute the
test run.
08
U4
01
Faulty wiring to Q1/Q2 or indoor- outdoor.
Connect transmission wiring of Branch Selector units
and indoor units to “TO IN/D UNIT (F1, F2)” and trans
-
mission wiring of other outdoor units to “TO OUT/D
UNIT (F1, F2)”.
03
Malfunction of connected indoor unit.
Check the malfunction code of indoor unit and resolve it.
U7
01
Faulty wiring to Q1/Q2 or indoor- outdoor.
Connect transmission wiring of Branch Selector units
and indoor units to “TO IN/D UNIT (F1, F2)” and trans
-
mission wiring of other outdoor units to “TO OUT/D
UNIT (F1, F2)”.
02
11
•
Too many indoor units are connected to F1/F2 line.
•
Faulty wiring between units.
•
Check indoor unit amount and total capacity con-
nected.
•
Check connection.
U9
01
•
System mismatch. Wrong type of indoor units com-
bined (R407C, Mini-split, etc).
•
Indoor unit malfunction.
Check if other indoor units have malfunction and con-
firm indoor unit mix is allowed.
UA
03
Connection malfunction over indoor units or type
mismatch (R407C, Mini-split, etc).
Check if other indoor units have malfunction and con-
firm indoor unit mix is allowed.
18
20
Wrong combination (different series (e.g. RXYQ and
REYQ), or different type (e.g. P type and T type)).
Correct the units combination.
27
Assembly defect of indoor, Branch Selector and
outdoor units (e.g. different models, number of units or
part numbers, or different series are mixed).
•
Check and modify the number of indoor units that
are connected.
•
Check the type of refrigerant for indoor and outdoor
units, and replace them with adaptable indoor/out-
door units in the case of inconsistency.
28
Different type of Branch Selector units are combined
in the system. Combination of T type (BSQ-TVJ, BS-
Q54TVJ) and P type (BSVQ-PVJU, BSV-Q36PVJU)
cause error.
Configure the system with only T type Branch Selector
units.
31
Wrong combination of outdoor units.
Correct the units combination.
49
53
•
Defect of Branch Selector units connecting position
or abnormality due to wiring error.
•
Abnormality of Branch Selector units DIP switches
settings.
•
Check that the wiring connection are correct, refer-
ring to the wiring diagram for Branch Selector units,
and correct if there are any errors.
•
Check that the DIP switches settings are correct,
referring to the installation manual enclosed in
Branch Selector units package, or to the “Service
precautions” plate attached to the control box cover,
and correct if there are any errors.
01_EN_3P362438-9N.indb 40
12/11/2019 2:36:02 PM