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Malfunction code
Main
Sub code
code
Master/sub 1/sub 2
03
UA
18
20
27
28
31
49
53
01
UH
01
UF
05
Malfunction code
Main code
Auto charging related
P2
P8
PE
P9
43
Contents
Connection malfunction over indoor units or type
mismatch (R407C, Mini-split, etc).
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Assembly defect of indoor, Branch Selector and
outdoor units (e.g. different models, number of units or
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Different type of Branch Selector units are combined
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cause error.
Wrong combination of outdoor units.
Defect of Branch Selector units connecting position
or abnormality due to wiring error.
Abnormality of Branch Selector units DIP switches
settings.
Auto address malfunction (inconsistency)
Auto address malfunction (inconsistency)
Stop valves closed.
Contents
Unusual low pressure on suction line.
Indoor unit freeze-up prevention.
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Check if other indoor units have malfunction and con-
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oor
Correct the units combination.
Check and modify the number of indoor units that
are connected.
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Check the type of refrigerant for indoor and outdoor
units, and replace them with adaptable indoor/out-
door units in the case of inconsistency.
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units.
Correct the units combination.
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
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and correct if there are any errors.
Check if transmission wired unit amount matches with
powered unit amount (by monitor mode) or wait till
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Check if transmission wired unit amount matches with
powered unit amount (by monitor mode) or wait till
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Open stop valves.
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.
Close valve A immediately. Push BS1 to reset. Retry
automatic charging procedures.
Prepare for automatic charging stopping.
Finish automatic charging mode.
Solution
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Solution
3P362438-5N English
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