8
Too low superheat due to low discharge
temperature
$EQRUPDOLIGLVFKDUJHVXSHUKHDWLVFRQ
-
WLQXRXVO\GHWHFWHGOHVVWKDQRUHTXDOWR
Û)>íÛ&@IRUPLQXWHVHYHQWKRXJK
OLQHDUH[SDQVLRQYDOYHKDVPLQLPXPRSHQ
SXOVHDIWHUFRPSUHVVRUVWDUWVRSHUDWLQJIRU
PLQXWHV
1
'LVFRQQHFWLRQRUORRVHFRQQHF
-
WLRQRIGLVFKDUJH
WHPSHUDWXUHWKHU
2
'HIHFWLYHKROGHURIGLVFKDUJH
WHPSHUDWXUHWKHUPLVWRU
3
'LVFRQQHFWLRQRUORRVHFRQQHFWLRQ
RIOLQHDUH[SDQVLRQYDOYH¶VFRLO
4
'LVFRQQHFWLRQRUORRVHFRQQHF
-
WLRQRIOLQHDUH[SDQVLRQYDOYH¶V
FRQQHFWRU
5
'HIHFWLYHOLQHDUH[SDQVLRQYDOYH
12
&KHFNWKHLQVWDOODWLRQFRQGLWLRQVRIGLV
-
FKDUJHWHPSHUDWXUHWKHU
3
&KHFNWKHFRLORIOLQHDUH[SDQVLRQYDOYH
2:72&+(&.7+(
&20321(176
4
&KHFNWKHFRQQHFWLRQRUFRQWDFWRI/(9$DQG
/(9%RQRXWGRRUFRQWUROOHUFLUFXLWERDUG
5
&KHFNOLQHDUH[SDQVLRQYDOYH5HIHUWR
+2:72&+(&.7+(3$576
Abnormal point and detection method
Case
Judgment and action
8
1
)DLOXUHLQWKHRSHUDWLRQRIWKH
'&IDQPRWRU
2
)DLOXUHLQWKHRXWGRRUFLUFXLW
FRQWUROOHUERDUG
1
&KHFNRUUHSODFHWKH'&IDQPRWRU
2
&KHFNWKHYROWDJHRIWKHRXWGRRUFLUFXLWFRQ
-
WUROOHUERDUGGXULQJRSHUDWLRQ
3
5HSODFHWKHRXWGRRUFLUFXLWFRQWUROOHUERDUG
ZKHQWKHIDLOXUHLVVWLOOLQGLFDWHGHYHQDIWHU
SHUIRUPLQJWKHUHPHG\
1
DERYH
Check Code
Outdoor fan motor
$EQRUPDOLIURWDWLRQDOIUHTXHQF\RIWKHIDQ
PRWRULVQRWGHWHFWHGGXULQJ'&IDQPRWRU
RSHUDWLRQ
)DQPRWRUURWDWLRQDOIUHTXHQF\LVDEQRUPDOLI
USPRUEHORZGHWHFWHGFRQWLQXRXVO\
IRUVHFRQGVDW
-
)>
:
@RUPRUH
RXWVLGHDLUWHPSHUDWXUH
USPRUEHORZRUUSPRUPRUH
GHWHFWHGFRQWLQXRXVO\IRUPLQXWH
8
'HWDLOHG
FRGHV
7RILQGRXWWKHGHWDLOKLVWRU\ODWHVWDERXW8HUURUWXUQ216:DQG
5HIHUWR)81&7,212)6:,7&+(6&211(&7256$1'-803(56
Overvoltage error
,QFUHDVHLQ'&EXVYROWDJHWR
+$9
1
$EQRUPDOLQFUHDVHLQSRZHU
VRXUFHYROWDJH
2
'LVFRQQHFWLRQRIFRPSUHVVRU
ZLULQJ
3
'HIHFWLYHRXWGRRUSRZHUFLUFXLW
ERDUG
4
&RPSUHVVRUKDVDJURXQGIDXOW
1
&KHFNWKHILHOGIDFLOLW\IRUWKHSRZHUVXSSO\
2
&RUUHFWWKHZLULQJ89:SKDVHWR
FRPSUHVVRU5HIHUWR7(6732,17
',$*5$02XWGRRUSRZHUFLUFXLWERDUG
3
5HSODFHRXWGRRUSRZHUFLUFXLWERDUG
4
&KHFNFRPSUHVVRUIRUHOHFWULFDOLQVXODWLRQ
5HSODFHFRPSUHVVRU
Undervoltage error
,QVWDQWDQHRXVGHFUHDVHLQ'&
EXVYROWDJHWR
+$9
1
'HFUHDVHLQSRZHUVRXUFH
YROWDJHLQVWDQWDQHRXVVWRS
2
'LVFRQQHFWLRQRUORRVH
FRQQHFWLRQRI&1&RQWKH
RXWGRRUSRZHUFLUFXLWERDUG
FRQWUROOHUFLUFXLWERDUG
3
'HIHFWLYHFRQYHUWHUGULYHFLUFXLW
LQRXWGRRUSRZHUFLUFXLWERDUG
4
'HIHFWLYH&GULYHFLUFXLWLQ
RXWGRRUSRZHUFLUFXLWERDUG
5
'LVFRQQHFWLRQRUORRVH
FRQQHFWLRQRI&1RQWKH
RXWGRRUSRZHUFLUFXLWERDUG
FRQWUROOHUFLUFXLWERDUG
6
3RZHUFLUFXLWIDLOXUHRQ'&
VXSSO\IRU9'&RXWSXWRQ
RXWGRRUFRQWUROOHUFLUFXLWERDUG
1
&KHFNWKHILHOGIDFLOLW\IRUWKHSRZHUVXSSO\
2
&KHFN&1&ZLULQJ
3
5HSODFHRXWGRRUSRZHUFLUFXLWERDUG
4
5HSODFHRXWGRRUSRZHUFLUFXLWERDUG
5
&KHFN&1ZLULQJ
6
5HSODFHRXWGRRUFRQWUROOHUFLUFXLWERDUG
Input current sensor error/
L1-phase open error
'HFUHDVHLQLQSXWFXUUHQW
WKURXJKRXWGRRUXQLWWR$
RQO\LIRSHUDWLRQIUHTXHQF\LV
PRUHWKDQRU]
RUFRPSUHVVRUFXUUHQWLVPRUH
WKDQRUHTXDOWR$
1
'HIHFWLYHLQSXWFXUUHQWGHWHFWLRQ
FLUFXLWLQRXWGRRUSRZHUFLUFXLW
ERDUG
2
'HIHFWLYHRXWGRRUFRQWUROOHU
FLUFXLWERDUG
1
5HSODFHRXWGRRUSRZHUFLUFXLWERDUG
2
5HSODFHRXWGRRUFRQWUROOHUFLUFXLWERDUG
OCH567
