Mitsubishi Electric PUHZ-SHW80VHA Service Manual page 20

9 - 1 . R E F R I G E R A N T C O L L E C T I N G
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W arning:
W h en p ump ing down th e refrigerant, stop th e c omp ressor b efore disc onnec ting th e refrigerant p ip es.
p ressure in th e refrigeration c y c le c ould b ec ome ex tremely h igh if air is drawn in, c ausing th e p ip es to b urst, p ersonal
inj ury , etc .
9 - 2 . U N I T R E P L A C E M E N T O P E R A T I O N
W h en reusing th e ex isting p ip es th at c arried R 2 2 refrigerant for th e S W 7 5 / 1 0 0 / 1 2 0 models, rep lac ement op eration
must b e p erformed b efore p erforming a test run.
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9 - 3. S T A R T A N D F I N I S H O F T E S T R U N
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N ote:
T h e op eration mode c annot b e c h anged b y S W 4 - 2 during test run. ( T o c h ange test run mode, stop th e unit b y S W 4 - 1 ,
c h ange th e op eration mode and restart th e test run b y S W 4 - 1 .)
OCH526C
( P U M P D O W N )
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<SW4>
C
ON
OFF
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A B
A Stop C Operation
B Cooling
Heating