Carrier 100 Series Service And Maintenance Procedures Manual
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WIRING DIAGRAMSRefer to Fig. 6 and 7 for wiring diagrams.TROUBLESHOOTINGRefer to the service label. (See Fig. 9—Service Label.)The Troubleshooting Guide following Fig. 9 can be a useful toolin isolating furnace operation problems. Beginning with the word“Start,” answer each question and follow the appropriate arrow tothe next item.The Guide will help to identify the problem or failed component.After replacing any component, verify correct operation sequence.Fig. 9—Service LabelA00286LE D COD E I f st at us code r eca l l i s neede d, bri efl y rem ov e then r eco nnec t one m ain l i m i t w i re to di sp l a y stor ed st atus co de. SER VICE To i ni t i at e t he com ponent t est sequenc e, shut O FF t he r oom t her m ost at or di sc onnect t he " R" t her m ost at l ead. Bri ef l y shor t t he TES T/ TW I N t er m i nal t o t he " Com 24V" te r m i nal . St at us LED w i l l f l ash code and t hen t urn O N t he i nduce r m ot or at hi gh speed unt i l t he end of t he t est , t hen shi f t t o l ow speed f or 10 seco nds. The hot sur f ace i gni t or , b l ower m ot or l ow-hea t speed, bl ower m ot or hi gh- heat speed, and b l ower m ot or cool speed w i l l be t ur ned O N f or 10- 15 seconds each. G as V al ve and H umid i f i er will n o t b e t u r ned on. 3263 79-101 REV. A (lit-top) CONT I NUOUS OF F - Chec k f or 1 15V A C at L 1 and L2 , and 2 4 V A C at SE C-1 an d SEC-2 . CONT I NUOUS ON - Contr ol has 24VA C power . RAPI D FLAS HING - Li ne v oltage (115VAC) polarity r e ver sed. If twinned , refer to twinni ng kit instructi ons . EA CH OF THE FO LLOW I NG STA TUS CO DES I S A TW O D I GIT NUM BER W I TH THE FI RST D I GI T D ETERM I NED BY THE NUM BER OF SHO RT FL ASH ES AND T HE SECO ND DI GI T BY THE NUM BER OF LONG FL ASH ES . ST A TUS COMPONENT TEST 11 N O PR EVIO US C O D E - St or ed s t at us c odes ar e er ased aut om at i cal l y af t er 72 ho ur s. 12 BL O WER ON AF T ER POWE R UP (11 5 V A C o r 2 4 V A C ) -B low er ru n s fo r 9 0 s e c on d s, if u nit i s p o w e re d up dur i ng a ca l l f or heat ( R-W cl osed) . 13 LI MIT, DRAFT SAFEGUA RD , FLAME ROLL -OUT SWIT CH OR BLOCKED VENT SWIT CH ( when used) LOC KOUT - C o n tro l w ill a u to r e s e t a fte r t h re e h o u rs . R e s e t s w itc h . R e fe r to #33. 14 IGNI TION LO CK OUT - C o n tro l w ill a u to -r e s e t a fte r t h re e h o u rs . R e f e r to # 3 4 . 21 GAS HE A TI NG L OCK OUT - C o n tro l w i ll N O T a uto re se t. C he c k f o r : - M is-w ired g a s v a lve - D e fe ctiv e co ntro l (va lve rela y) 22 ABNO RMA L FLAME- PR OVING SI GN AL - F la m e is p ro v e d w h ile g a s v a lv e is d e -e n e rg iz e d . In d u c e r w ill ru n unt i l f aul t i s cl ear ed. C heck f or: - Leaky gas val ve - St uc k- open gas val ve 23 PRESSURE SW I TCH DI D NOT OPEN C he c k f o r : - O bstr ucted pr es sure t ub i ng . - Pressu re s w i t ch st uc k cl os ed. 24 SECOND AR Y V OLTA GE FUSE I S OPEN C heck f or : - Shor t ci r cui t i n secondar y v ol t age ( 24V AC ) wi r i ng. 31 HI GH-H EAT PRESSURE SWI TCH OR RELAY DID NOT CLOS E OR REOPENE D C he c k f o r : C o n tro l re lay m a y b e de f e ctiv e - R e fe r to # 3 2 32 LOW - HEA T PRESSURE SWITCH DID NOT CLOSE OR REOPENED I f open l onger t han f i ve m i nut es, i nducer shut s of f f or 15 m i nut es bef or e r et r y. C heck f or : - Proper vent si zi ng - D ef ect i ve i nducer m ot or - D is c o n n e c te d o r o b s tru c te d p re s s u re tu b in g - Ex cess i ve w i n d - D efect i v e pr es sure s w i tch - R e s tr ict e d v e n t - In a d e q u a te c o m b u s tio n a ir s u p p ly - Low i nduce r vol t age ( 115VA C ) i f code f l ashe s wh i l e uni t r uns i n l ow-h eat wi t h hi gh speed i nducer . I f i t opens af t er t r i al f or i gni t i on per i od, bl ow er will c o m e o n f o r 9 0 s e cond r ecyc l e del a y. 33 LI MIT, DRAFT SAFEGUA RD , FLAME ROLL -OUT SWIT CH OR BLOCKED VENT SWIT CH ( when used) LOC KOUT IS O P E N - If open l onger t han t hr ee m i nut es, code chang es t o #13. Fl am e rol l - out s wi t ch re qui r es m anual r eset . Check f or : - Def ect i ve b l ower m ot or or ca paci t or . - D i r t y f i l t er or r est r i ct ed duct syst em . - Rest r i ct ed v ent - Loos e b l owe r wheel . - Def ect i ve swi t ch or co nn ecti on s. - Pr oper vent si zi ng - Excess i ve w i nd - I nadequat e comb ust i on ai r supp l y ( Fl am e Rol l - out Sw i t ch open) . - O pen Fl am e Rol l - out swi t ch. M anual r eset or r epl ace. 34 IG NITION PR O VING F A ILUR E - C o ntro l w i ll tr y t h re e m o re ti m e s b ef o re lo ck ou t # 1 4 o cc urs . If fl a m e sig na l l ost af t er t r i al f or i gni t i on per i od, bl ow er wi l l c om e on f or 90 sec ond r ecyc l e del a y. Chec k f or : - O xi de bui l dup on f l am e sensor ( cl ean w i t h f i ne st eel w ool ) . - Pr oper f l am e sense m i cr oam ps ( . 5 m i cr oam ps D . C . m i n. , 4. 0 - 6. 0 nom i nal ) . - G as val ve def ect i ve or gas val ve t ur ned of f . - D e f e c tiv e H o t S u rf a c e Ig n ito r - M a n u a l v a lv e s h u t- o ff. - Low i nl et gas pr essur e. - Cont r ol gr ound cont i nui t y - I nadequat e f l am e car r yover or r ough i gni t i on. - Fl ame sens or m ust be ungr ounded. - G ree n /Y e ll o w w ire MUST be co nnect ed t o f ur nace sheet me t al . 43 LOW - HEA T PRESSURE SWITCH OPEN WH I LE HI GH-HEA T PRESSURE SWI TCH I S CLOSED C he c k f o r : - Pr essur e s wi t ch st uck open - Di scon nect ed or obst r uct ed pr essu r e t ubi ng 45 CON T R OL CI RC UI TR Y LOC K O UT A ut o- r eset af t er one hour l oc kout due t o; - F lam e se n s e c ircu it f ailu re - S oftw are ch e ck e rror - G a s v alv e re lay stu ck o p en R eset pow er t o cl ear l ock out . R epl ace cont r ol i f st at us code r epeat s. A002869 |
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