Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 167

[ VII Control ]
-15- Control at Initial Start-up <PURY>
When the unit is started for the first time, it will run the following course of operation.
(1) Flow chart of initial operation mode
Step 1
Operation of No.1 compressor only
P72~P144
P168~P234
Exception : Completed if discharge superheat reaches above 25 C [77 F] within
Step 3
Forced operation of No.2 compressor only
Completed in the integrated operation time of 5 minutes
(2) Initial start-up control of P168-P234 models: time chart
Example
No.1 compressor
ON/OFF
No.2 compressor
ON/OFF
[Restrictions for the initial setup mode during heating]
When the compressor discharge SH is small or the discharge pressure is low in heating only, heating main, or cooling
main mode, the total capacity of operable outdoor unit will be restricted.(other than when there is only one indoor unit)
[Total capacity of operable indoor unit]
In case of Indoor unit of P72 model: P32 model or less
In case of outdoor unit of P96-P234 models: P52 model or less
Start of initial operation mode
: f 60 Hz. Completed in the continuous integrated operation time of
20 minutes or in the integrated operation time of 90 minutes.
:
60 Hz or lessfor the first 30 minutes , 85 Hz or less after 30 minutes.
No.2 compressor not in operation.
Completed in the integrated operation time of 40 minutes.Completed in
the integrated operation time of 40 minutes
5 minutes of start-up.
P168 - P234 types
Completion of initial operation mode
40 minutes
Step 1
- 158 -
P72 - P144 types
Completion of initial operation mode
5 minutes
Step 3