Hitachi RAC-25WPA RAC25WPA ユーザーズマニュアル
製品コード
RAC25WPA
14-9
14.2 DISCHARGE PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT
Warning
Caution
•
•
Voltage of about 350V is charged between the terminals of smoothing capacitors.
•
High voltage (DC360V) is also charged at terminals of ACT module and power module
•
During continuity check for each circuit part of the outdoor unit, be sure to discharge the smoothing capacitors
14.2.1 MONOZONE RAC-25NPA / 35NPA / 50NPA &
MULTIZONE RAM-36NP2A / 53NP2A / 53NP3A / 68NP3A / 70NP4A / 130NP6A & MONO SPLIT RAF-
50PXA / RAC-50FXA, RAD-50/60/70PPA / RAC-50/60/70DPA
50PXA / RAC-50FXA, RAD-50/60/70PPA / RAC-50/60/70DPA
Disharge Procedure
1. Turn off the power supply to the outdoor unit.
2. After power is turned off, wait for 10 minutes or more. Then remove the electrical parts cover and apply soldering iron of 30 to
1. Turn off the power supply to the outdoor unit.
2. After power is turned off, wait for 10 minutes or more. Then remove the electrical parts cover and apply soldering iron of 30 to
75W for 15 seconds or more to P1 and N1 terminals on system power module, in order to discharge voltage in smoothing
capacitor
capacitor
3. Remove receptacle of red/gray lead wire connected to system power module from diode stack before performing operation
check of each circuit.
As shown above, apply soldering iron to metal
parts (receptacle) inside the sleeve corresponding
to P1 and N1 terminals of system power module.
Do this with smoothing capacitors kept connected.
By removing red/gray lead wire from diode stack,
power supply can be shut off (corresponding to (+)
and (-).
to P1 and N1 terminals of system power module.
Do this with smoothing capacitors kept connected.
By removing red/gray lead wire from diode stack,
power supply can be shut off (corresponding to (+)
and (-).
Do no use a soldering iron with transformer:
If one is used, thermal fuse inside transformer
will be blown.
will be blown.
14.2.2 MULTIZONE RAM-90NP5A
Disharge Procedure
1. Turn off the power supply to the outdoor unit and disconnect the power plug.
2. Wait for 10 minutes or more after power is turned off and then remove electrical parts box lid as shown below. Apply soldering
1. Turn off the power supply to the outdoor unit and disconnect the power plug.
2. Wait for 10 minutes or more after power is turned off and then remove electrical parts box lid as shown below. Apply soldering
iron of 30~75W for 15 seconds or more at P1 and N1 black/white lead receptacles on Capa board to discharge voltage from
smoothing capacitor. Do not loosen or remove screws of intelligent power module: If screw is loose, voltage will not be
discharged.
smoothing capacitor. Do not loosen or remove screws of intelligent power module: If screw is loose, voltage will not be
discharged.
3. Before operation check on each part of circuit, remove receptacle of red/gray lead connected to ACT module from diode stack.
4. As shown left, apply soldering iron to metal parts TAB 01 P and TAB 02 terminals of Capa board.
4. As shown left, apply soldering iron to metal parts TAB 01 P and TAB 02 terminals of Capa board.
Do no use a soldering iron with transformer:
If one is used, thermal fuse inside transformer
will be blown.
will be blown.
System Power module
Soldering
iron
iron
Soldering iron
Capacitor Board
Lead
Wire
Wire
BLK
WRT
P1
N1
Io
N2
Io
N1
P
L1
La