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ACS320 FAN REPLACEMENT
To replace the fan perform the following:
1.
Remove power from drive. Wait for 5 minutes and then make
sure by measuring that there is no voltage
2.
Insert a small straight blade screwdriver into the slot and
press in to release the top cover as shown in See Fig. 42 —
on page 31.
3.
Free the fan cable from the clip in the drive frame (see
Fig. 49).
4.
Lift the holder from the hinges (see Fig. 49).
4
Fig. 49 — Remove Fan Holder and
Free Fan Cable
5.
Disconnect the fan cable. The fan cable connector is
located on the control board that is against the front of the
drive.
6.
Free the fan cable from the clip in the fan holder (see
Fig. 50).
7.
Remove the fan from the holder (see Fig. 50).
6
Fig. 50 — Remove Fan from Holder
3
6
7
6
8.
Install the new fan in reverse order.
9.
Restore power.
Bypass the VFD
Bypassing the VFD is not recommended. This is a temporary
procedure to provide cooling or heating operation when a new
VFD is required. When in this bypass mode the fire shut down
will not turn off the blower and it will continue to run. The
bypass should only be used for a short duration until a new
VFD has been received.
The factory-installed VFD is wired and agency approved as out-
lined in this manual. This VFD is utilized to help provide added
efficiencies and comfort during the cooling operation.
If there is an occasion where the VFD has mis-functioned and
temporary cooling/operation is required, bypass the VFD as
shown in Fig. 51 and 52.
To bypass ACS320 VFD on fused units – 48/50TC 07-14,
50TCQ 07-12, 48/50HC 07-12, 50HCQ 08-09, and 40RU:
1.
Turn off and lock out unit power.
2.
Disconnect the connector linking the fuse to the VFD.
3.
Disconnect the connector between the VFD and the indoor
fan motor.
4.
Disconnect the ground wires at the base of the VFD.
5.
Remove the VFD, if required.
6.
Replace standard fuses with Slow Blow fuses.
7.
Connect the lead from the fuse to the lead from the indoor
fan motor.
8.
Connect the ground wire from the indoor fan motor to the
fan deck.
9.
Restore power.
To bypass ACH550/580 VFD on non-fused units –
48/50TC 16-30, 50TCQ 14-24, and 48/50HC 17-28:
1.
Turn off and lock out unit power.
2.
Disconnect the connection between the control box and
the VFD.
3.
Disconnect the connection between the indoor fan motor
and the VFD.
4.
Disconnect the ground wires at the base of the VFD.
5.
Remove the VFD, if required.
6.
Connect the lead from the control box to the lead from the
indoor fan motor.
7.
Attach the ground wire leading from the fan motor to the
fan deck.
8.
Restore power.
33
WARNING
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