Mitsubishi Electric PU(H)Y-P250YGM-A, Service Handbook

Page: 84 / 215

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[
VII
Control ]
VII Control [1] Functions and Factory Settings of the Dipswitches
1. Outdoor unit
(1) Main board
Switch Function
Function according to switch setting Switch setting timing
OFF ON OFF ON
SWU 1-2 Unit address setting Set to 00 or 51-100 with the dial switch Before power on
SW1 1-10
For self-diagnosis/op-
eration monitoring Refer to the LED monitor display on
the outdoor unit board.
Anytime after power on
SW2
1 - - - -
2
Deletion of connec-
tion information
Normal control Deletion Before power on
3
Deletion of error his-
tory SW Storage of IC/OC
error history Deletion of IC/OC
error history Anytime after power on (When
switched from OFF to ON)
4
Refrigerant amount
adjustment
Normal control
Refrigerant
amount adjust-
ment mode Anytime after power on (Will be dis-
abled 2 hours after compressor start
up except during initial start up mode)
5 - - - -
6 - - - -
7 Forced defrost Normal control
Forced defrost
starts
Anytime after
power on (When
switched from
OFF to ON)
10 minutes after
compressor start-
up
8 Defrost timer setting 50 minutes 90 minutes
Anytime after power on (When
switched from OFF to ON)
9 - - - -
10 - - - -
SW3
1
SW3-2 function: en-
abled/disabled
SW3-2 disabled SW3-2 enabled Anytime after power on
2
Test run mode: ON/
OFF
Stops all ICs
Sends a test-run
signal to all IC After power on and when SW3-1 is
on.
3
Defrost start tempera-
ture
-10°C
(-8 °C for 500
model unit) -7°C
(-5 °C for 500
model unit)
Anytime after power on
4
Defrost end tempera-
ture
10°C
( 7°C for 500
model unit) 15°C
(12°C for 500
model unit)
Anytime after power on (except dur-
ing defrost operation)
5 - - - -
6 Pump down operation Normal control
Pump down oper-
ation After power on and while compressor
is stopped
7
Target condensing
temperature on the
heating mode Tcm
49°C 53°C Anytime after power on
8 - - - -
9 - - - -
10 - - - -
Note: All are set to OFF at factory shipment. (* For PUY series, only the SW4-9 is set to ON.)
Unless otherwise specified, set the switch to OFF where indicated by "-," which may be set to a certain setting
for a reason.