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43
3P362438-5N English
Malfunction code
Contents
Solution
Main
code
Sub code
Master/sub 1/sub 2
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.
UH
01
Auto address malfunction (inconsistency)
Check if transmission wired unit amount matches with
powered unit amount (by monitor mode) or wait till
initialization is finished.
UF
01
Auto address malfunction (inconsistency)
Check if transmission wired unit amount matches with
powered unit amount (by monitor mode) or wait till
initialization is finished.
05
Stop valves closed.
Open stop valves.
Malfunction code
Contents
Solution
Main code
Auto charging related
P2
Unusual low pressure on suction line.
Close valve A immediately. Push BS1 to reset. Check
following items before retrying automatic charging
procedures:
•
Check if gas pipe stop valves are opened correctly.
•
Check if the valve of the refrigerant cylinder is
opened.
•
Check if air inlet and outlet of indoor units are not
obstructed.
P8
Indoor unit freeze-up prevention.
Close valve A immediately. Push BS1 to reset. Retry
automatic charging procedures.
PE
Automatic charging nearly finished.
Prepare for automatic charging stopping.
P9
Automatic charging finished.
Finish automatic charging mode.
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12/11/2019 11:24:26 AM