Mitsubishi Electric PUHY-HP120TNU-A, Service Handbook

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[5-1 Dipswitch Functions and Factory Settings ]
HWE18240_GB chapter 5 -
5
5 Control
1) To change the settings, set SW6-10 to ON, set SW4, and press and hold SWP3 for 2 seconds or longer (OFF
ļ
ON).
LED3 will light up when the switch setting is ON, and lights off when OFF.
Use the LED3 display to confirm that the settings are properly made.
The settings will need to be set again when the control board is replaced. Write down the settings on the electrical wiring drawing label.
2) A: Only the switch on OC needs to be set for the setting to be effective.
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 switches on both the OC and OS need to be set.
D: The switch on either the OC or OS needs to be set.
3) For details, refer to the following page(s).[5-2-7 Defrost Operation Control]
4) The table below shows the combinations of the settings for items No. 897 and No. 900 and the target evaporating temperature setting that corresponds
to each combination.
5) The table below shows the combinations of the settings for items No. 964 and No. 982 and the target evaporating temperature setting that corresponds
to each combination.
6) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.
7) The settings that are configured with SW4 (SW6-10: ON) will automatically be stored on the indoor units that support the new function*. The stored
settings will automatically be restored when the outdoor unit control board is replaced.
If none of the connected indoor units supports the new function, no configuration information will be saved. If this is the case, manually record the
settings configuration on the control box panel.
*The new function is supported on most units that are manufactured in December of 2012 and later. Depending on the model, this function may be
added on later date. Ask your dealer for further details.
8) The multiple-stage low-noise function controls the fan by targeting the capacities shown in the table below.
9) Shaded areas ( ) indicate factory settings.
(3) Fan board
Œ
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.
Œ
To set the address for a unit with one fan, only set SW1-3 to ON (= address 5). To set the addresses for a unit with two fans,
set SW1-3 on the fan board on the right side (when seen from the front of the control box) to ON (= address 5) and set SW1-
4 on the left fan board to ON (= address 6).
Œ
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
No.900
OFF ON
No.897 OFF 0°C [32°F] 9°C [48°F]
ON 6°C [43°F] 14°C [57°F]
Switch
No.982
OFF ON
No.964 OFF 0°C [32°F] -4°C [25°F]
ON -2°C [28°F] -6°C [21°F]
Switch
No.1006
OFF ON
No.997 OFF 50% 60%
ON 85% 70%
Switch Function
Function according to switch
setting
Switch setting timing
OFF ON
SW1 1 Enabling/Disabling no-load operation
No-load operation will continue for ap-
proximately 30 seconds, and then the
unit will come to an abnormal stop. For
details, refer to the following page(s). [8-
9-8 Checking the Fan Board for Damage
at No Load] No-load oper-
ation disabled No-load oper-
ation enabled Anytime after power on
2 - - - -
3 Address setting. See the notes below. 0 5 Before power on
4 Address setting. See the notes below. 0 6 Before power on