Discharging Capacitors - Hitachi RAF-25NH4 Service Manual

The smoothing capacit-
ors (330µF x 3pcs.) are
charged to about 380V.
Don't forget to discharge
them before attempting
access to electric parts.

DISCHARGING CAPACITORS

1. Turn off the indoor unit's power switch or unplug the power cord, and wait for
a minute or so.
2.
Open the cover of the electric parts compartment. Discharge electricity from
smoothing capacitors (330µF x 3pcs.) by connecting the leads of a soldering
iron of 30-75W to the terminals provided for this purpose. Continue discharg-
ing for more than 15 seconds.
Ｐ ２
N1
P1
SPM2 (system power module)
Smoothing capacitor
Connecting cord (¿2, single lead)
Strip off insulation for about
Ｕ
20 mm at the end.
V
W
−
+
L1
L2
Soldering iron of 30-75W
258
Do not use a soldering
iron with built-in
transformer : the fuse
built in the transformer
would blow out.