Mitsubishi Electric PURY-P200 Service Handbook page 99

(3) Patterns of outdoor unit heat exchanger capacity control
[P200-P400types]
Operation Operation
mode pattern
1
2
3
Cooling
only
4
5
6
1
2
3
Cooling
4
main
5
6
8
1
Heating only
1
2
Heating
main
7
8
1
Defrosting
Note 1 : 21S4b and 21S4c are not energized during cooling cycle and energized during heating cycle.
Note 2 : SV5a and SV5b are not energized when it is open and energized when it is closed.
8. Control at initial startup
• If the unit is started within 2 hours of power on when the outdoor temperature is below a certain degree
(below 5˚C for cooling operation and below -5˚C for heating operation), the unit will be on the stand-by mode
and will not start for 30 minutes after power on. (P200 type only)
• When the unit is started for the first time, it will run the following course of operation.
Flow chart of initial operation mode
Step 1
• Operation of only No.1 compressor
P200
P250~P400
P450~P650
Exception : completed if discharge super heat reaches above
Step 3
• Forced operation of only No.2 compressor
• Completed in the integrated operation time of 5 minutes
Solenoid valve
SV4a SV4b SV4c SV4d
ON ON ON OFF
ON ON ON OFF
OFF ON ON OFF
OFF ON OFF OFF
OFF OFF ON OFF
OFF OFF OFF OFF
ON ON ON OFF
ON ON ON OFF
OFF ON ON OFF
OFF ON OFF OFF
OFF OFF ON OFF
OFF OFF OFF OFF
OFF OFF OFF ON
ON ON ON OFF
ON ON ON OFF
ON ON ON OFF
ON ON ON ON
OFF OFF OFF ON
ON ON ON OFF
Start of initial operation mode
: f 50Hz and completed in the continuous integrated operation time
of 20 minutes or the integrated time of 90 minutes.
: f 60Hz and completed in the continuous integrated operation time
of 20 minutes or the integrated time of 90 minutes.
: For the first 30minutes f
No.2 compressor not in operation.
Completed in the integrated operation time of 40 minutes.
5 minutes of start up.
P450~P650 types
Completion of initial operation
- 96 -
[P450-P650types]
Operation Operation
mode pattern
SV4a SV4b
1
ON
2
ON
3
OFF
Cooling
only
4
OFF
5
OFF
6
OFF
1
ON
2
ON
3
OFF
Cooling
4
OFF
main
5
OFF
6
OFF
8
OFF
1
Heating only
ON
1
ON
2
ON
Heating
main
7
ON
8
OFF
1
Defrosting
ON
60Hz, 30minutes and on f
25˚C
Solenoid valve
SV4c SV4d SV5a SV5b
ON ON OFF ON ON
ON ON OFF OFF OFF
ON ON OFF OFF OFF
ON OFF OFF OFF OFF
OFF ON OFF OFF OFF
OFF OFF OFF OFF OFF
ON ON OFF ON ON
ON ON OFF OFF OFF
ON ON OFF OFF OFF
ON OFF OFF OFF OFF
OFF ON OFF OFF OFF
OFF OFF OFF OFF OFF
OFF OFF ON OFF OFF
ON ON OFF ON ON
ON ON OFF ON ON
ON ON OFF OFF OFF
ON ON ON OFF OFF
OFF OFF ON OFF OFF
ON ON OFF ON ON
85Hz.
within
P200~P400 type