Mitsubishi Electric CITY MULTI PUHY-400YMF-B, Service Handbook, Page: 78 / 204

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<Initial start control timing chart>
Note 1: If the frequency of No. 1 compressor is above the specified level at the end of Step 2, the mode proceeds to
Step 3.
Note 2: At the completion of Step 2, if the frequency of No. 1 compressor is below the specified value and if Step 2 has
been completed less than 3 times, the process does not proceed to Step 3 but rather enters the Pause Step
and then repeats Step 2.
Note 3: At the completion of Step 2, if it has been completed more than 3 times, the mode will proceed to Step 3 even
if the frequency of No. 1 compressor is below the specified value.
30 minutes
Step 1
3
minutes
10 minutes
Step 2
5 minutes
Step 3
ON/OFF of
No.1 compressor
ON/OFF of
No.2 compressor
End of initial operation mode
Note 1
30 minutes
Step 1
3
minutes
10 minutes
Step 2
3
minutes
10 minutes
Step 2 Step 2
5 minutes
Step 3
Note 1
ON/OFF of
No.1 compressor
ON/OFF of
No.2 compressor
Note 2
End of initial operation mode
30 minutes
Step 1
3
minutes
10 minutes
Step 2
3
minutes
10 minutes
Step 2
3 times
3
minutes
10 minutes
Step 2
5 minutes
Step 3
Note 3
ON/OFF of
No.1 compressor
ON/OFF of
No.2 compressor
Note 2
End of initial operation mode
(Example 1)
(Example 2)
(Example 3)