102
࡛
After installing the product, be sure to perform leak tests on the piping connections. After pumping
down refrigerant to inspect or relocate the outdoor unit, be sure to stop the compressor and then
remove the connected pipes.
ৄ
Do not operate the compressor while a valve is open due to refrigerant leakage from a pipe or an
Ї͝ʀͱ͝͝ʪʀϩʪʒͱθ̈͝ʀͱθθʪʀϩ̷цʀͱ͝͝ʪʀϩʪʒΧ̈Χʪɇ̷̈Їθʪϩͱʒͱϑͱ͔ɇцʀɇЇϑʪɇ̈θϩͱѤͱӥ͝ϩͱϩ˵ʪʀͱ͔Χθʪϑϑͱθɇ͝ʒ
too a high pressure to develop inside the refrigerant circuit, leading to an explosion or product malfunction.
WARNING
K2 (Number of press)
KEY operation
Display on segment
1 time
Refrigerant charging in Cooling mode
“K” “5” “BLANK” “BLANK”
2 times
Trial operation in Cooling mode
“K” “6” “BLANK” “BLANK”
3 times
Pump down all units in Cooling mode
“K” “7” “BLANK” “BLANK”
4 times
H/R: Checking the pipe connection
H/P: Automatic setting of operation mode
(Cooling/Heating) for trial operation
“K” “8” “BLANK” “BLANK”
5 times
Checking the amount of refrigerant
“K” “9” X X (Display of last two digits may differ
depending on the progress)
6 times
Discharge mode of DC link voltage
“K” “A” “BLANK” “BLANK”
7 times
Forced defrost operation
“K” “B” “BLANK” “BLANK”
8 times
Forced oil collection
“K” “C” “BLANK” “BLANK”
9 times
Inverter compressor 1 check
“K” “D” “BLANK” “BLANK”
10 times
Inverter compressor 2 check
“K” “E” “BLANK” “BLANK”
11 times
Fan 1 check
“K” “F” “BLANK” “BLANK”
12 times
Fan 2 check
“K” “G” “BLANK” “BLANK”
13 times
A type PBA
End key operation
B type PBA
H/R : Auto pipe pairing,
H/P : Unused
“K” “H” X X (Display of last two digits may differ
depending on the progress)
14 times
B type PBA
End key operation
࢜
During "Discharge mode of DC link voltage", voltage of INV1 and INV2 will be displayed alternately.
࢜
Even when the outdoor unit power is off, it is dangerous when you come in contact with inverter PCB and
fan PCB since they are charged with high DC voltage.
࢜
When pressing K2 key 9 to 12 times without inverter checker, error code can be displayed on segment even
though the outdoor unit is normal.
࢜
When replacing/repairing the PCB, cut-off the power and wait until the DC voltage is discharged before
replacing/repairing them. (Wait for more than 15 minutes to allow it to discharge naturally.)
࢜
When there were error, 'Discharge mode of DC link voltage' may not have been effective. Especially if error
kߦߨߦɇ͝ʒkߥߨߦ˵ɇЭʪɵʪʪ͝ͱʀʀЇθθʪʒࡥΧͱиʪθʪ̷ʪ͔ʪ͝ϩ͔̈˝˵ϩɵʪʒɇ͔ɇ˝ʪʒɵцѣθʪɇ͝ʒϩ˵ʪθʪ˙ͱθʪࡥʒͱ͝ͱϩЇϑʪ
the 'Discharge mode of DC link voltage'.
࢜
If the 1st-generation MCU is installed, the Auto pipe pairing operation can not be used.
If the 2nd-generation MCU is installed, the Checking the pipe connection can not be used.
ৄ
1st-generation MCU : MCU-S*NEE*N, MCU-S2NEK1N
ৄ
2nd-generation MCU : MCU-S*NEK2N,MCU-S4NEK3N,MCU-S1NEK1N
࢜
If there is an A type PBA among the outdoor units installed as a module, the Auto pipe pairing operation
can not be used.
K3 (Number of
press)
KEY operation
Display on segment
1 time
Initialize (Reset) setting
Same as initial state
Setting outdoor unit option switch and key function
