Mitsubishi Electric PUHY-P1000, Service Handbook, Page: 97 / 334

[5-1 Dipswitch Functions and Factory Settings ]
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HWE14040 GB
2) PUHY-P450, P500YKB-A1

The default settings for all switches are OFF. Unless otherwise specified, leave the switch that are indicated by "-" to OFF,
which may be set to OFF for a reason.

Leave SW001-1 to OFF during normal operation. Setting this switch to ON disables the error detection function and may result
in equipment damage.
(4) Fan board (Control box side, Fan box side)

Only the addresses are preset before shipment (All other switches are set to OFF.) Unless otherwise specified, leave the
switch to OFF where indicated by "-," which may be set to OFF for a reason.

Set SW1-5 on the control-box-side fan board to ON (address = 5). Set SW1-6 on the fan-box-side fan board to ON (address
= 6).

Leave SW1-1 to OFF during normal operation. Setting this switch to ON will disable the error detection function and may result
in equipment damage.
Switch Function
Function according to switch
setting
Switch setting timing
OFF ON
SW001
1
Detects or ignores the following errors
ACCT/DCCT sensor fault (5301 Detail
No. 115 and 116)
ACCT/DCCT sensor circuit fault (5301
Detail No. 117 and 118)
Open-circuited IPM/Loose CNCT2
connector (5301 Detail No. 119)
Detection of faulty wiring (5301 Detail
No. 120) Error detec-
tion enabled Error detec-
tion disable
(No load op-
eration is pos-
sible.) Anytime after power on
2 - - - -
Switch Function
Function according to switch
setting
Switch setting timing
OFF ON
SW1 1 Enabling/Disabling no-load opera-
tion
No-load operation will continue for
approximately 30 seconds, and
then the unit will come to an abnor-
mal stop. For details, refer to the
following page(s). [8-9-9 Checking
the Fan Inverter for Damage at No
Load](page 270) No-load oper-
ation disabled No-load oper-
ation enabled Anytime after power on
2 - - - -
3 - - - -
4 - - - -
5 Address setting (Control box side) 0 5 Before power on
6 Address setting (Fan box side) 0 6 Before power on