49-5000640 Rev. 0
Troubleshooting Tips... Before you call for service
TROUBLESHOOTING TIPS
FAULT CODES - Press and hold MODE, then press AUX
7KLVVKRZVDOOFXUUHQWIDXOWFRGHVDQGF\FOHVWKURXJKWKHP,IWKHUHDUHQRFXUUHQWIDXOWVWKHGLVSOD\VKRZV
3UHVVLQJ$8;FOHDUVWKHIDXOWV$Q\RWKHUNH\H[LWVDQGSUHVHUYHVWKHIDXOWV
Fault Code
Numbers
Fault Meaning
Effective on system operation while
fault is active
,QVLGHIDQIDXOW)DQPRWRUQRWPRYLQJDWFRPPDQGHGVSHHGDIWHUVHFRQGVRI
GULYH)DXOWFOHDUVDIWHUPLQXWHV
No resistance heating, fan, heating pump or
cooling available.
2
2XWVLGHIDQIDXOW)DQPRWRUQRWPRYLQJDWFRPPDQGVSHHGDIWHUVHFRQGVRI
GULYH)DXOWFOHDUVDIWHUPLQXWHV
No heat pump or cooling available.
Resistance heating and fan only.
3
External thermostat wiring. Applied signal is not valid and has been constant for
VHFRQGV
No external control of fans, heat and cooling
internal control operation only.
,QVLGHWKHUPLVWRUIDXOW2QHRIWKHLQVLGHWKHUPLVWRUVLVQRWUHDGLQJYDOLG
temperatures.
No cooling or heat pump operation available.
Resistance heating and fan only.
5
Outside thermistor fault.
One of the outside thermistors is not reading valid temperatures.
No cooling or heat pump operation available.
Resistance heating and fan only.
&RPSUHVVRUIDXOW1RWHPSHUDWXUHFKDQJHKDVEHHQGHWHFWHGDIWHUPLQXWHRI
running.
No effect.
7
5HYHUVHYDOYHIDXOW7HPSHUDWXUHFKDQJHQRWKDSSHQLQJDVH[SHFWHGDIWHU
minute of running.
No cooling or heat pump operation available.
Resistance heating and fan only.
Software fault.
No effect.
,QGRRUFRLOIUHH]HIDXOW7KHWHPSHUDWXUHRIWKHLQVLGHFRLOKDVIDOOHQEHORZWKH
IUHH]HWKUHVKROG)
7KHFRPSUHVVRULVVKXWGRZQXQWLOWKHFRLO
temperature recovers.
+HDWSXPSRYHUORDGIDXOW7KHLQVLGHFRLOWHPSHUDWXUHLVRYHUWKHRYHUORDG
WKUHVKROG)
7KHFRPSUHVVRULVVKXWGRZQZKLOHWKHFRLO
temperature recovers.
2YHUKHDWIDXOW7KHLQFRPLQJDLULVWRRKRWWRUXQWKHKHDWHU
Heat pump and resistance heating are shut
down and restarted when the indoor ambient
temperature cools sufficiently.
8,ERDUGGLVFRQQHFWHGIDLOHG
No effect.
+HDWHUDLUIORZIDXOW,QGRRUDLUIORZLVXQH[SHFWHGO\ORZ)DXOWFOHDUVDIWHU
minutes.
No resistance heating available.
N/A
N/A
Outlet thermistor failure. Fault clears when thermistor reads value other than short
circuit or open circuit.
No resistance heating available.
2XWOHWWHPSHUDWXUHRYHUKHDW7KHRXWJRLQJDLULVWRRKRW)DXOWFOHDUVZKHQDLU
temperature drops below threshold.
No resistance heating available.
5HSHDWHGRXWOHWWHPSHUDWXUHRYHUKHDW7KHRXWJRLQJDLULVWRRKRW&KHFNLQGRRU
fan operation and check unit/ductwork for blockage.
No resistance heating available.
23
Make-up Air Module Fault. Fan is not operating as expected
No effect
0DNHXS$LU0RGXOH9HQW'RRU)DXOW9HQWGRRUYDOLGDWLRQIDLOHG
No effect
25
$EQRUPDO'HIURVW)DXOWKHDWSXPSPRGHOVRQO\:LOOVHOIFOHDUDIWHUGD\V
/RFNVRXWKHDWSXPSORFNVRXWGHIURVW
$LU&RQGLWLRQLQJ/RFNRXW)DXOW6HWVZKHQRXWGRRUDPELHQWWHPSHUDWXUHGURSV
EHORZ):LOOVHOIFOHDUDIWHU2XWGRRU$PELHQWWHPSHUDWXUHULVHVDERYH)
/RFNVRXWFRPSUHVVRUFRROLQJRSHUDWLRQ
27
,QVLGH&RLO9DSRU7HPSHUDWXUH6HQVRU)DXOW$=9RQO\5HDGLQJVLQYDOLG)DXOW
clears when readings are valid.
/RFNVRXW(OHFWURQLF([SDQVLRQ9DOYH((93,
control when in cooling operation
2XWVLGH&RLO9DSRU/LTXLG7HPSHUDWXUH6HQVRU)DXOW$=9RQO\5HDGLQJV
invalid. Fault clears when readings are valid.
/RFNVRXW((93,FRQWUROZKHQLQKHDWSXPS
operation. Modifies defrost termination target
+XPLGLW\6HQVRU)DXOW$=9RQO\5HDGLQJVLQYDOLG)DXOWFOHDUVZKHQUHDGLQJV
are valid.
3UHYHQWVXQLWIURPUXQQLQJGHKXPLGLILFDWLRQ
cycles.
((96XSHUKHDWIDXOW$=9RQO\((9XQDEOHWRUHWXUQVXSHUKHDWWRYDOLGUDQJH
/RFNVRXWFRPSUHVVRUIRUPLQXWHVKRPHV
((9VWKHQDOORZVFRPSUHVVRUWRUHVWDUW
,QYHUWHU)DXOW$=9RQO\,QYHUWHUERDUGLVLQDIDXOWHGVWDWHWKDWSUHYHQWVLWIURP
running normally.
/RFNVRXWFRPSUHVVRUIRUPLQXWHVWKHQ
allows compressor to restart