Functions And Factory Settings Of The Dipswitches - Mitsubishi Electric PUHY-HP144TSHMU-A Service Handbook

[ VII Control ]
VII Control

[1] Functions and Factory Settings of the Dipswitches

1. Outdoor unit
(1) Control board
Switch Function
SWU 1-2 Unit address setting
For self-diagnosis/op-
SW1 1-10
eration monitoring
Centralized control
1
switch
Deletion of connec-
2
tion information
Deletion of error his-
3
tory SW
4 Pump down mode
5
SW2
6
Forced defrost
7
(Note 3)
Defrost timer setting
8
(Note 3)
Target evaporating
9
temperature setting
10
1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.
2) A: Only the switch on either the OC or OS needs to be set for the setting to be effective on both units.
B: The switches on both the OC and OS need to be set to the same setting for the setting to be effective.
C: The setting is effective for the unit on which the setting is made.
3) Refer to "VII [2] Controlling the Outdoor Unit" for details.(page 83)
4) The table below shows the combination of SW2-9 and SW3-5 settings and the target evaporating temperature setting that
corresponds to each combination.
Switch
SW3-5
HWE0716A
Function according to switch setting
OFF
Set to 00 or 51-100 with the dial switch
Refer to the LED monitor display on the
outdoor unit board.
Without connec-
tion to the central-
ized controller
Normal control
(OC) Storage of IC/
OC error history
(OS) Storage of OS
error history
Normal control
- -
- -
Normal control
50 minutes
Depends on the setting combination with
the SW3-5 setting (Note 4)
- -
OFF
OFF 0°C [32°F]
ON -2°C [28°F]
Switch setting timing
ON OFF
Before power on
Anytime after power on
With connection to
the centralized Before power on
controller
Deletion Before power on
(OC) Deletion of
IC/OC error history Anytime after power on
(When switched from OFF
(OS) Deletion of
to ON)
OS error history
After being energized and
Pump down mode while the compressor is
stopped
-
-
10 minutes
Forced defrost after com-
starts pressor
startup
Anytime after power on
90 minutes (When switched from OFF
to ON)
Anytime after power on
-
SW2-9
ON
-4°C [25°F]
-6°C [21°F]
- 77 -
Units that re-
quire switch
setting
Note.2
ON OC OS
C C
C C
B B
A -
C C
A -
- - -
- - -
Anytime af- A A
ter power
on (When
switched
from OFF to
ON)
B B
A -
- - -
GB