Mitsubishi Electric R410A Service Handbook page 111

[5-2 Outdoor Unit Control ]
(3) P264, P288, P312, P336, P360 models
Initial startup mode starts.
The compressor on the OC starts up.
F 60Hz
The total operating load of the indoor unit
after 5 minutes of operation is P96 or above.
( *1 Qj
The total operating load of the indoor unit after
5 minutes of operation is between P96 and P400.
(50 < *1 Qj< 200)
The compressor on the OS remains in operation, and the
compressors on the OS1 and OS2 start up.
50 F 60Hz (OC, OS1, and OS2)
Completed in the integrated operation time of 35 minutes.
or F < 50Hz (OC, OS1, and OS2)
Completed in the integrated operation time of 90 minutes.
or the discharge superheat (TH4 - Tc) is detected (within
5 minutes of startup) that remains above approximately
25 degrees for one minute .
*2
The air conditioning load is
too small for the OC, OS1,
and OS2 to simultaneously
stay in operation.
*3
The air conditioning load is
too small for both OC and
OS1, or OS1 and OS2 to
simultaneously stay in
operation.
*4
The air conditioning load is
high enough for OC, OS1
and OS2 to simultaneously
stay in operation.
*5
The air conditioning load is
high enough for both OC
and OS1, or OS1 and OS2
to simultaneously stay in
operation.
Initial startup mode complete
1 Qj:Total capacity (models) code
For the capacity code, refer to the following table.
Model
Capacity (model) code
HWE14080
No
50)
Yes
Yes
No
The compressor on the OC remains in operation,
and the compressor on the OS1 starts up.
*2
50 F
Completed in the integrated operation time of 35 minutes.
or F < 50Hz (both OC and OS1)
Completed in the integrated operation time of 90 minutes.
or the discharge superheat (TH4 - Tc) is detected
(within 5 minutes of startup) that remains above
*4
approximately 25 degrees for one minute .
The OC, OS1, and OS2 stop.
The startup sequence of the OC, OS1,
and OS2 is rotated.
(The startup sequence of the OC,
OS1 and OS2 is changed.)
The compressor on the OS1 remains in operation,
and the compressor on the OS2 starts up.
50 F
Completed in the integrated operation time of 35 minutes.
or F < 50Hz (both OS1 and OS2)
Completed in the integrated operation time of 90 minutes.
or the discharge superheat (TH4 - Tc) is detected
(within 5 minutes of startup) that remains above
approximately 25 degrees for one minute .
P06 P08 P12
4 5 6
*3
60Hz (both OC and OS1)
*5
60Hz (both OS1 and OS2)
P15 P18 P24
8 10 13
- 102 -
The compressor on the OC starts up.
50 F 60Hz (OC)
Completed in the integrated operation time of 35 minutes.
or F < 50Hz (OC)
Completed in the integrated operation time of 90 minutes.
or the discharge superheat (TH4 - Tc) is
detected (within 5 minutes of startup) that
remains above approximately 25 degrees for
one minute .
The OC, OS1, and OS2 stop.
The startup sequence of the OC,
OS1, and OS2 is rotated.
(The startup sequence of the OC,
OS1 and OS2 is changed.)
The compressor on the OS1 starts up.
50 F 60Hz (OS1)
Completed in the integrated operation time of 35 minutes.
or F < 50Hz (OS1)
Completed in the integrated operation time of 90 minutes.
or the discharge superheat (TH4 - Tc) is
detected (within 5 minutes of startup) that
remains above approximately 25 degrees for
one minute .
The OC, OS1, and OS2 stop.
The startup sequence of the OC,
OS1, and OS2 is rotated.
(The startup sequence of the OC,
OS1 and OS2 is changed.)
The compressor on the OS2 starts up.
50 F 60Hz (OS2)
Completed in the integrated operation time of 35 minutes.
or F < 50Hz (OS2)
Completed in the integrated operation time of 90 minutes.
or the discharge superheat (TH4 - Tc) is
detected (within 5 minutes of startup) that
remains above approximately 25 degrees for
one minute .
P27 P30 P36
14 16 20
P48
25
GB