Mitsubishi Electric PURY-P72 Service Handbook page 148

[VII Control]
-10· Control at Initial Start-up
.When started up for the first time before 12 hours have elapsed after power on, the unit goes into the initial startup mode.
•At the completion of the initial operation mode on the OC and OS, they will go into the normal control mode.
1. Flowchart of initial operation
(1) P72, P96, P120 models
I
Initial startup mode starts.
I
•
• 50:;; F :s 60Hz
Completed in the integrated operation time of 35
minutes.
or F < 50Hz
Completed in the integrated operation time of 90 minutes.
I
Initial startup mode complete
I
(2) P144, P168, P192, P216, P240 models
'1 LOj:Total capacity (models) code
No
Yes
• The compressor on the OC remains in operation. and the
compressor on the OS starts up.
• 50:S F:s 60Hz (both OC and OS)
Completed in the integrated operation time of 35 minutes.
or F < 50Hz (both OC and OS)
Completed in the integrated operation time of 90 minutes.
'2
'3
r--------- ----------;
, ,The compressor on the OC starts up.
• 50:s F:s 60Hz (OC)
Completed in the integrated operation time of 35 minutes.
or F < 50Hz (OC)
Completed in the integrated operation time of 90 minutes.
HWEOB03A
I
Initial startup mode complete
I
, • Both the OC and
as
stop.
'-----i • The startup sequence of the OC and OS is rotated.
I '-- ..,-
- - - - J
I
,
! .
The compressor on the
as
starts up.
I .
50:S F:;; 60Hz (OS)
, Completed in the integrated operation time of 35 minutes.
I
or F < 50Hz (OS)
, Completed in the integrated operation time of 90 minutes.
L_________ _
--!
'2
The air conditioning load is too small
for both the OC and the
as
to
simultaneously stay in operation.
'3
The air conditioning load is
high enough for both OC and
as
to
simultaneously stay in operation.
- 138-
GB