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Mitsubishi Electric PUHY-P72 Service Manual page 100

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[ VII Control ]
Switch
Function
1
2
3
4
Low-noise mode
5
selection
SW5
6
7
8
9
10
Backup heating
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) When set to the capacity priority mode and if the following conditions are met, the Low-noise mode will terminate, and the unit
will go back into the normal operation mode.
Cooling: Outside temperature is high or high pressure is high.
Heating: Outside temperature is low or low pressure is low.
(2) INV board
1) PUHY-P72, P96, P120YHMU-A, PUHY-P72, P96THMU-A
Functions are switched with the following connector.
Connector
CN6 short-
Enabling/disabling the following error
circuit con-
detection functions;
nector
ACCT sensor failure
(5301 Detail No. 115)
ACCT sensor circuit failure
(5301 Detail No.117)
IPM open/ACCT erroneous wiring
(5301 Detail No. 119)
Detection of ACCT erroneous wiring
(5301 Detail No.120)
CN6 short-circuit connector is mated with the mating connector.
Leave the short-circuit connector on the mating connector during normal operation to enable error detection and protect the
equipment from damage.
HWE0804A
Function according to switch setting
OFF
-
-
-
-
-
-
-
-
Capacity priority
mode
Note 3
-
-
-
-
-
-
-
-
Ineffective
Function
Switch setting timing
ON
OFF
-
-
-
-
Low-noise mode
Before being energized
-
-
-
-
Effective
Any time after power on
Function according to connec-
tor
Enabled
Disabled
Error detec-
Error detec-
tion enabled
tion disable
(No load op-
eration is pos-
sible.)
- 91 -
Units that re-
quire switch
setting
Note.2
ON
OC
-
-
-
-
-
-
-
-
-
-
-
-
A
-
-
-
-
-
-
-
-
A
Setting timing
Enabled
Disabled
Anytime after power on
OS
-
-
-
-
-
-
-
-
-
-
GB

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