Carrier 42NQV050M Service Manual page 89

No. Part name
ƒ
Inverter
1) Perform work of item 1 in
assembly
2) Remove screw (ST1TØ4 × 8L 2 pcs.) of the
Be careful to check the inverter because
high-voltage circuit is incorporated in it.
3) Perform discharging by connecting
Be careful to discharge the capacitor
because the electrolytic capacitor
cannot naturally discharge and voltage
remains according to trouble type in
some cases.
This capacitor is one with mass capacity.
Therefore, it is dangerous that a large
spark generates if short-circuiting
between
etc. for discharging.
4) Remove screw (ST1TØ4 × 8L 2 pcs.) fixing
5) Remove the front cabinet by performing step
6) Remove various lead wires from the holder
7) Pull the inverter box upward.
8) Disconnect connectors of various lead wires.
As each connector has a lock mecha-
nism, avoid to remove the connector by
holding the lead wire, but by holding the
connector.
Procedure
upper part of the front cabinet.
• If removing the inverter cover in this
condition, P .C. board can be checked.
• If there is no space above the unit, perform
‚
work of 1 in .
polarity by discharging resistance (approx.
100Ω40W) or plug of soldering iron to
terminals a of the C14 (printed "CAUTION
HIGH VOLTAGE" is attached.) electrolytic
capacitor (38NYV050M= 500µF,
38NYV060M=760µ F) on P.C. board.
NOTE
, polarity with screwdriver,
the main body and the inverter box.
‚
1 in , and remove the fixing screws
(ST1TØ4 × 8L) for securing the main body
and inverter box.
at upper part of the inverter box.
Requirement

.
,
Discharging position
(Discharging period
, 10 seconds or more)
A screw
( STIT-4X8MSZN) Terminal block
Put the compressor
leads through
the hole
The connector is one
with lock, so remove
it while pushing the
part indicated by
an arrow.
Be sure to remove the connector by
holding the connector, not by
pulling the lead wire.
– 88 –
Remarks
Inverter cover
P . C. board
(Soldered surface)
Plug of
soldering
iron
Put each leads
throu g h the hole