[4-2 Outdoor Unit Circuit Board Components ]
- 74 -
HWE14040
GB
(2) PUHY-P450, P500YKB-A1
1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.
Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that
the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less. It takes about 10 minutes to discharge electricity
after the power supply is turned off.
2) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter-
minals to remove them.
3) Control box houses high temperature parts. Be well careful even after turning off the power source.
4)
Perform the service after disconnecting the outdoor unit fan board connector (CNINV) and the inverter board con-
nector (CN1). Before plugging in or unplugging connectors, check that the outdoor unit fan is not rotating and that
the voltage between SC-P and SC-N on the capacitor board is 20 VDC or less. The capacitor may collect a charge and
cause an electric shock when the outdoor unit fan rotates in windy conditions.
Refer to the wiring nameplate for details.
5) To connect wiring to TB7, check that the voltage is 20 VDC or below.
6) Reconnect the connector (CNINV) back to the fan board and reconnect the connector (CN1) back to the inverter board after
servicing.
7) When the power is on, the compressor or heater is energized even while the compressor is stopped. Before turning on the
power, disconnect all power supply wires from the compressor terminal block, and measure the insulation resistance of the
compressor. Check the compressor for a ground fault. If the insulation resistance is 1.0 M
Ω
or below, connect all power supply
wires to the compressor and turn on the power to the outdoor unit. It is energized to evaporate the liquid refrigerant that has
accumulated in the compressor.
CNCT4A
Electric current sensor
(DC) output
(CT3)
CT-3
Electric current sensor
(DC bus current)
SC-L1
input(L1)
SC-L2
input(L2)
SC-L3
input(L3)
SC-B
DC bus current input
IGBT(Rear)
CT-1
Electric current sensor(U)
CT-2
Electric current sensor(W)
F1
Fuse 250 VAC
3.15A
CN10
Gate power supply input
+
-
SW001
ON: No-load operation
OFF: Normal operation
OFF: Fixed
CNTYP
INV board Type
CN5V
GND
5 VDC output
CNTH
DCL thermistor input
CNCT4B
Electric current sensor
(DC) input
(CT-3)
CN43
GND(Fan board)
Serial communication
signal input
SC-N
Bus voltage output(N)
FT001
Neutral point output(P)
CNRY
Inrush current limiting
relay input
SC-L
DC bus current input
SC-P
Bus voltage output(P)
R001
Oversurrent
detection resistor
FT-R21
Bus voltage output(P)
LED5
Lit: Power is supplied to
the relay drive
Unlit: Power is not supplied
to the relay drive
LED4
Microcomputer in operation
LED1
Lit: Inverter operation
Blinking: Inverter error
CN1
Bus voltage output
N
P
CN2
Serial communication
signal output
GND
17 VDC input
17 VDC input
GND
SC-U
Inverter output(U)
SC-V
Inverter output(V)
SC-W
Inverter output(W)
Содержание PUHY-P1000
Страница 1: ......
Страница 11: ... 2 HWE14040 GB ...
Страница 27: ... 18 HWE14040 GB ...
Страница 40: ... 2 6 System Connection Example 31 HWE14040 GB 2 Restrictions ...
Страница 61: ... 52 HWE14040 GB ...
Страница 75: ... 66 HWE14040 GB ...
Страница 93: ... 84 HWE14040 GB ...
Страница 121: ... 112 HWE14040 GB ...
Страница 171: ... 6 11 Standard Operation Data Reference Data 162 HWE14040 GB ...
Страница 243: ... 7 9 Error Code Definitions and Solutions Codes 7000 7999 234 HWE14040 GB ...
Страница 295: ... 8 13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit 286 HWE14040 GB ...
Страница 297: ... 288 HWE14040 GB ...
Страница 334: ......