Service Manual MM09YJ-MM12YJ


Installation and Maintenance
6HUYLFH0DQXDO
Liquid side
Outdoor unit
3-way
valve
Gas side
Indoor unit
2-way
valve
Clsed
Clsed
Lo
Vacuum pump
CLOSE
OPEN
$LUSXUJLQJ
&$87,21'RQRWOHDNWKHJDVLQWKHDLUGXULQJ$LUSXUJLQJ
3URFHGXUH
&RQQHFWWKH FKDUJH KRVH IURPWKH PDQLIROGYDOYHWR WKH
VHUYLFHSRUWRIWKHJDVVLGHSDFNHGYDOYH
&RQQHFWWKHFKDUJHKRVHWRWKHSRUWRIWKHYDFXXPSXPS
2SHQIXOO\WKHORZSUHVVXUHVLGHKDQGOHRIWKHJDXJHPDQ
LIROGYDOYH
2SHUDWHWKHYDFXXP SXPS WR EHJLQ HYDFXDWLQJ3HUIRUP
HYDFXDWLQJIRUDERXWPLQXWHVLIWKHSLSLQJOHQJWKLVPH
WHUV  PLQXWHV IRU  PHWHUVDVVXPLQJ D SXPS FDSDFLW\
RIOLWHUVSHUPLQXWH&RQ¿UPWKDWWKHFRPSRXQGSUHVVXUH
JDXJHUHDGLQJLV±N3D±FP+J
&ORVHWKHORZSUHVVXUHYDOYHKDQGOHRIJDXJHPDQLIROG
– Check the flare connections for gas leakage.
8VH WRUTXHZUHQFK WRWLJKWHQWKHVHUYLFHSRUW QXWWR D
WRUTXHRINJFP
6HWWKHZD\YDOYHWRWKHEDFNVHDW
0RXQWWKHYDOYHVWHPQXWVWRWKHZD\DQGZD\YDOYHV
&KHFNIRUJDVOHDNDJH
– At this time, especially check for gas leakage from the 2-way
and 3-way valves stem nuts, and from the service port nut.
&$87,21
,IJDVOHDNDJHDUHGLVFRYHUHGLQVWHSDERYHWDNHWKH
IROORZLQJPHVXUHV
,IWKHJDVOHDNVVWRSZKHQWKHSLSLQJFRQQHFWLRQVDUH
WLJKWHQHGIXUWKHUFRQWLQXH ZRUNLQJ IURP VWHS ,IWKHJDV
OHDNV GRQRW VWRSZKHQ WKHFRQQHFWLRQV DUHUHWLJKWHQHG
UHSDLUWKHORFDWLRQRIWKHOHDNGLVFKDUJHDOORIWKHJDV
WKURXJKWKHVHUYLFHSRUWDQGWKHQUHFKDUJHZLWKWKHVSHFL¿HG
DPRXQWRIJDVIURPDJDVF\OLQGHU