Mitsubishi Electric PUHY-HP144TSHMU-A Service Handbook page 88

[ 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. (page 22)
(2) INV board
Functions are switched with the following connector.
Connector
CN6 short- Enabling/disabling the following error
circuit con- detection functions;
ACCT sensor failure
nector
(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.
HWE0716A
Function according to switch setting
OFF
- -
- -
- -
- -
Capacity priority
mode (Note 3)
- -
- -
- -
- -
Disabled
Function
Switch setting timing
ON OFF
-
-
-
-
Low-noise priority
Before being energized
mode
-
-
-
-
Enabled Anytime after power on
Function according to connector
Enabled Disabled
Error detection Error detection
enabled disable
(No load opera-
tion is possi-
ble.)
- 79 -
Units that re-
quire switch
setting
Note.2
ON OC OS
- - -
- - -
- - -
- - -
A -
- - -
- - -
- - -
- - -
A -
Setting timing
Enabled Disabled
Anytime after power on
GB