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49-5000561 Rev. 2
Troubleshooting Tips... Before you call for service
Save time and money! Review the charts on the following pages first and you may not need to call for service.
Problem Possible Cause What To Do
The unit does not function
after installing Remote
Wall Thermostat
Unit thermostat connections are incorrect. 9HULI\ZLULQJIURP5HPRWH:DOO7KHUPRVWDWLVFRUUHFWWRXQLW
thermostat connector.
7UDQVIRUPHUUHVHWVRURSHQVZLWKVKRUW Wait 5 minutes to see if power resets.
Heat pump operates with
electric heat only during
heating.
Outdoor ambient temperature is too cold. Heat pump operation will not function if the outdoor ambient
temperature is too cold. Heat pump will resume once the
outdoor temperature has sufficiently warmed up
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&KHFN$X[0RGHWREHVXUHWKHPRGHLVVHWWROFF³8´IRU
heat pump operation.
TROUBLESHOOTING TIPS
FAULT CODES - Press and hold MODE, then press AUX
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3UHVVLQJ$8;FOHDUVWKHIDXOWV$Q\RWKHUNH\H[LWVDQGSUHVHUYHVWKHIDXOWV
Fault Code
Numbers
Fault Meaning Effective on system operation while
fault is active
,QVLGHIDQIDXOW)DQPRWRUQRWPRYLQJDWFRPPDQGHGVSHHGDIWHU
VHFRQGVRIGULYH)DXOWFOHDUVDIWHUPLQXWHV
1RUHVLVWDQFHKHDWLQJIDQKHDWLQJ
pump or cooling available.
2 2XWVLGHIDQIDXOW)DQPRWRUQRWPRYLQJDWFRPPDQGVSHHGDIWHU
VHFRQGVRIGULYH)DXOWFOHDUVDIWHUPLQXWHV
1RKHDWSXPSRUFRROLQJDYDLODEOH
Resistance heating and fan only.
3 ([WHUQDOWKHUPRVWDWZLULQJ$SSOLHGVLJQDOLVQRWYDOLGDQGKDVEHHQ
FRQVWDQWIRUVHFRQGV
1RH[WHUQDOFRQWURORIIDQVKHDWDQG
cooling internal control operation only.
,QVLGHWKHUPLVWRUIDXOW2QHRIWKHLQVLGHWKHUPLVWRUVLVQRWUHDGLQJYDOLG
temperatures.
1RFRROLQJRUKHDWSXPSRSHUDWLRQDYDLODEOH
Resistance heating and fan only.
5 Outside thermistor fault.
One of the outside thermistors is not reading valid temperatures.
1RFRROLQJRUKHDWSXPSRSHUDWLRQDYDLODEOH
Resistance heating and fan only.
&RPSUHVVRUIDXOW1RWHPSHUDWXUHFKDQJHKDVEHHQGHWHFWHGDIWHU
minute of running.
1RHIIHFW
7 5HYHUVHYDOYHIDXOW7HPSHUDWXUHFKDQJHQRWKDSSHQLQJDVH[SHFWHG
DIWHUPLQXWHRIUXQQLQJ
1RFRROLQJRUKHDWSXPSRSHUDWLRQDYDLODEOH
Resistance heating and fan only.
8 Software fault. Stack overflow. 1RHIIHFW
,QGRRUFRLOIUHH]HIDXOW7KHWHPSHUDWXUHRIWKHLQVLGHFRLOKDVIDOOHQ
EHORZWKHIUHH]HWKUHVKROG)
7KHFRPSUHVVRULVVKXWGRZQXQWLOWKH
coil temperature recovers.
+HDWSXPSRYHUORDGIDXOW7KHLQVLGHFRLOWHPSHUDWXUHLVRYHUWKH
RYHUORDGWKUHVKROG)
7KHFRPSUHVVRULVVKXWGRZQZKLOHWKH
coil temperature recovers.
2YHUKHDWIDXOW7KHLQFRPLQJDLULVWRRKRWWRUXQWKHKHDWHU Heat pump and resistance heating are
shut down and restarted when the indoor
ambient temperature cools sufficiently.
8,ERDUGGLVFRQQHFWHGIDLOHG 1RHIIHFW
Heater airflow fault. 1RUHVLVWDQFHKHDWLQJDYDLODEOH
1$ 1$
Outlet thermistor failure. Fault clears when thermistor reads value other
than short circuit or open circuit.
1RUHVLVWDQFHKHDWLQJDYDLODEOH
2XWOHWWHPSHUDWXUHRYHUKHDW7KHRXWJRLQJDLULVWRRKRW)DXOWFOHDUV
when air temperature drops below threshold.
1RUHVLVWDQFHKHDWLQJDYDLODEOH
2XWOHWWHPSHUDWXUHRYHUKHDW7KHRXWJRLQJDLULVWRRKRW 1RUHVLVWDQFHKHDWLQJDYDLODEOH
23 1$ 1$
1$ 1$
25
$EQRUPDO'HIURVW)DXOWKHDWSXPSPRGHOVRQO\6HWZKHQFRQVHFXWLYHGHIURVW
F\FOHVIDLOHGWRZDUPRXWGRRUFRLODERYH):LOOVHOIFOHDUDIWHUGD\V
Locks out heat pump, locks out defrost.
Air Conditioning Lockout Fault. Sets when outdoor ambient temperature drops
EHORZ):LOOVHOIFOHDUDIWHU2XWGRRU$PELHQWWHPSHUDWXUHULVHVDERYH)
Locks out compressor cooling operation.
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