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CAUTION
!
• Guaranteed Temperature range(Error occurs out of guaranteed tem-
perature range)
IDU : 20~32°C
ODU : 10~38°C
• Set IDU wired remote controller temperature sensor setting as
'IDU'.
• Make certain that IDU doesn't run with thermo off mode during op-
eration.
Error contents about auto refrigerant charging function
: Temperature Range Error (In case that IDU or ODU is out of
range)
: System Unstable Error (In case, After 45 min operating the
system, it does not be stable)
How to cope with Result of Refrigerant Checking
• If the temperature is not in guaranteed Temperature range, the sys-
tem will not execute Refrigerant checking and the system will be
OFF.
• Excess of Refrigerant(619)
After remove the 20% of calculated total refrigerant, recharge the
refrigerant by using Refrigerant Auto Charging Function.
• Scarcity of Refrigerant(629)
Charge the refrigerant by using Refrigerant Auto Charging Function.
• Impossible to Judge(639)
IF the system is not in order, check the other problem except refrig-
erant.
Night Silent Operation
In cooling mode, this function makes the ODU fan operate at low RPM
to reduce the fan noise of ODU at night which has low cooling load.
U3 Chassis (2 Fan Model)
DIP switch No.12+14 ON
Main PCB power reset
Note 1)
Setting the Fan Max. RPM
Setting complete
SW02V
SW01V
SW01B
SW01S
CAUTION
!
• Request installer to set the function during installation.
• In case the function is not used, set the DIP switch OFF and reset
the power.
• If ODU RPM changes, cooling capacity may go down.
Setting RPM
Step
SW01V (Black) SW02V (Red)
1
2
3
U4 Chassis (1 Fan Model)
Step
1
2
3
DIP S/W NO.3, NO.5 ON
h Reset power after changing DIP S/W
CAUTION
!
• Request additional function setting to installer.
• In case of not using additional function, DIP switch off and reset.
• If RPM of outdoor unit fan is changed, capacity may be down.
ODU
SW01B
ODU
SW01S
SW01V
SW02V
Setting
Fan Max
RPM
1 time
1 time
420
2 times
1 time
370
3 times
1 time
320
Fan Max
Setting
RPM
DIP S/W NO.3 ON
420
DIP S/W NO.5 ON
370
320
Judgment
Operation
(hr)
(hr)
8
9
8
9
8
9
Judgment
Operation
(hr)
(hr)
8
9
8
9
8
9
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