67
9-9. TEST POINT DIAGRAM
Outdoor multi controller board
PUMY-P48NHMU PUMY-P48NHMU
1
PUMY-P48NHMU
2
PUMY-P48NHMU-BS PUMY-P48NHMU
1
-BS PUMY-P48NHMU
2
-BS
PUMY-P36NHMU PUMY-P36NHMU-BS
SW2
pump down
21S4
Four-way valve
SV1
Bypass valve
CNAC
Power supply for multi
controller board
CNS1
Indoor/ outdoor unit
connecting wire
CNS2
Transmission wire of
centrallized control
CN40,CN41
Centralized control power
supply/ For storing
jumper connector selection
CN102
Connect to the M-P.B
(Transmission power board)
CN51
External signal
output
SW4
Model select
SW7
Forced defrost
SW3
Test run
CN2
Connect to the outdoor
power circuit board
1
-
5
:
Power circuit board
→
Transmitting signal to
the multi controller board
(0-5V DC)
2
-
5
: Zero cross signal
(0-5V DC)
3
-
4
: 18VDC
(ACTM power supply)
6
-
5
: 16V DC
(Inverter drive power supply)
7
-
5
: 16V DC
(Inverter drive power supply)
CNDC
DC290V–350V
(
1
(+)–
3
(-))
V
CC
(TEST POINT
2
)
(Voltage between pins of
C82A) : DC15V
(Same as CNF1,2
5
(+)–
4
(-))
V
SP
(TEST POINT
3
)
(voltage between pins of
C515 and C516) :
DC0V (when stopped)
DC1–6.5V (when operated)
(Same as CNF1,2
6
(+)–
4
(-))
CNF1, 2
Connect to fan motors
1
–
4
: DC290V–350V
5
–
4
: DC15V
6
–
4
: DC0–6.5V
7
–
4
: DC15V (when stopped)
DC0–15V pulse
(when operated)
V
DC
(TEST POINT
1
)
(Voltage between pins of
C510) : DC290V–350V
(Same as CNF1,2
1
(+)–
4
(-))
V
FG
(TEST POINT
4
)
(voltage between left pins of
PC511 and PC512, pin1 and
pin2) :
(Same as CNF1,2
7
(+)–
4
(-))
TH4 Thermistor
<Discharge>
TH7/ 6 Thermistor
<Outdoor/ Saturation tem-
perature of suction pressure>
63HS
High presser sensor
63H
High presser switch
TH3 Thermistor
<Outdoor pipe>
CN3D
Input of demand control
63L
Low pressure switch
SW1
Display selection
(Self diagnosis)
SWU2, SWU1
Address setting
SW8
Demand/ Silent selection
52C
52C relay signal
CNLVB
(only P36/P48NHMU
2
)
Connect to the oudoor noise
filter circuit board(CN52C)
1
–
6
: DC12V
CNDC and C510 have the same voltage.
Also possible to check at self check No. 45
SW1 : 10110100
