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28

TAM9-SF-1D-EN

EVC THERMAL RESISTANCE AND VOLTAGE TABLE

7(03

)

7(03

&

7+(50,6725

5(6,67$1&(

2+06 

9ROWV '& DW SOXJ -

(9$3 7(03 (7

2UDQJH WR 2UDQJH

*$6 7(03 *7

%ODFN WR %ODFN

7(03

)

7(03

&

7+(50,6725

5(6,67$1&(

2+06 

9ROWV '& DW SOXJ -

(9$3 7(03 (7

2UDQJH WR 2UDQJH

*$6 7(03 *7

%ODFN WR %ODFN

7(03

)

7(03

&

7+(50,6725

5(6,67$1&(

2+06 

9ROWV '& DW SOXJ -

(9$3 7(03 (7

2UDQJH WR 2UDQJH

*$6 7(03 *7

%ODFN WR %ODFN

 ± 

 ± 

 ± 

 ± 

 

 ± 

 

 ± 

 

 ± 

 

 ± 

 

 ± 

 

 ± 

 

 ± 

 

 ± 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9DOXHV VKRXOG EH ZLWKLQ  

7HVW 0HWKRGV

R85

R49

D3

C42

C29

R22

C38

C32

C33

D12

R27

R20

C16

R83

D20

R15

R14

L1

C37

R3

D1

R43

R12

R26

C36

R48

R78

R72

C30

R73

R77

R59

D8

R5

R19

R40

D5

R44

L2

MOV1

J2

R9

L3

C1

C4

Q4

J1

J6

Q1

Q2

Q3

MH3

MH2

J3

+V

GND

OVR

B/Z

GAS

TEMP

FLOW

+12V

GND

TEMP

EVAP

A/Y

J3

OVR

GAS

TEMP

FLOW

+12V

GND

TEMP

EVAP

J3

GT Sensor

See Table Above

Test Pin-Pin

ET Sensor

GAS TEMP test point

EVAP TEMP test point

 :KHQ PHDVXULQJ '& YROWDJH XVH (YDS 7HPS DQG *DV 7HPS SRLQWV

WR *1' JURXQG WHVW SRLQW

 :KHQ PHDVXULQJ '& YROWDJH PHDVXUH IURP (7 6HQVRU SLQ WR SLQ

DQG *7 6HQVRU SLQ WR SLQ DW - FRQQHFWRU

 :KHQ PHDVXULQJ UHVLVWDQFH UHPRYH - KDUQHVV DQG PHDVXUH (7

DQG *7 SLQ WR SLQ

Summary of Contents for TAM9A0A24V21DA

Page 1: ...eath or serious injury When working on the equipment observe all precautions in the literature and on the tags stickers and labels that are attached to the equipment April 2020 T TA AM M9 9 S SF F 1 1D D E EN N Communicating 24 Volt control Variable Speed Outdoor Compatible Convertible Air Handlers TAM9A0A24V21DA TAM9A0B30V31DA TAM9A0C36V31DA TAM9A0C42V41DA TAM9A0C48V41DA TAM9A0C60V51DA N No ot te...

Page 2: ...Fo ol ll lo ow w a al ll l e el le ec ct tr ri ic ca al l s sa af fe et ty y p pr re ec ca au ut ti io on ns s w wh he en n e ex xp po os se ed d t to o l li iv ve e e el le ec ct tr ri ic ca al l c co om mp po on ne en nt ts s I It t m ma ay y b be e n ne ec ce es ss sa ar ry y t to o w wo or rk k w wi it th h l li iv ve e e el le ec ct tr ri ic ca al l c co om mp po on ne en nt ts s d du ur ri i...

Page 3: ...HHGV LUHFW 9DULDEOH LUHFW 9DULDEOH LUHFW 9DULDEOH 0 YV LQ Z J 6HH DQ 3HUIRUPDQFH 7DEOH 6HH DQ 3HUIRUPDQFH 7DEOH 6HH DQ 3HUIRUPDQFH 7DEOH 1R 0RWRUV 3 0RWRU 6SHHG 530 9DULDEOH 0 9DULDEOH 0 9DULDEOH 0 9ROWV 3K PSV F F F 7 5 LOWHU XUQLVKHG 1R 1R 1R 7 SH 5HFRPPHQGHG 7KURZDZD 7KURZDZD 7KURZDZD 1R 6L H 7KLFNQHVV LQ LQ LQ 5 5 5 17 5 5 5 5HI LQH RQQHFWLRQV UD HG UD HG UD HG RXSOLQJ RU RQQ 6L H LQ DV RXSOLQ...

Page 4: ...DULDEOH 0 YV LQ Z J 6HH DQ 3HUIRUPDQFH 7DEOH 6HH DQ 3HUIRUPDQFH 7DEOH 6HH DQ 3HUIRUPDQFH 7DEOH 1R 0RWRUV 3 0RWRU 6SHHG 530 9DULDEOH 0 9DULDEOH 0 9DULDEOH 0 9ROWV 3K PSV F 7 5 LOWHU XUQLVKHG 1R 1R 1R 7 SH 5HFRPPHQGHG 7KURZDZD 7KURZDZD 7KURZDZD 1R 6L H 7KLFNQHVV LQ LQ LQ 5 5 5 17 5 5 5 5HI LQH RQQHFWLRQV UD HG UD HG UD HG RXSOLQJ RU RQQ 6L H LQ DV RXSOLQJ RU RQQ 6L H LQ LT 0 16 216 UDWHG Q 8QFUDWHG ...

Page 5: ...TAM9 SF 1D EN 5 Wiring D806028P01RevD IMPORTANT Low voltage harness ships in document pack and needs to be installed ...

Page 6: ... EVC will now control superheat for 2nd stage 5 When a request for cooling is removed the AFC will turn off the blower motor after any user selected fan off delays have expired N No ot te e Delay profiles from the thermostat may change blower motor timing and actual airflow demand H He ea at t p pu um mp p c co om mp pr re es ss so or r o on nl ly y 1 When a request for 1st stage heat is received ...

Page 7: ...no ot t e en ne er rg gi iz ze ed d d du ur ri in ng g t th he e U Un ni it t T Te es st t M Mo od de e 1 EVC drives the EEV motor to the 1st stage position for 5 seconds 2 EVC drives the EEV motor to the 2nd stage position for 5 seconds 3 AFC energizes the blower at 50 and then continues to ramp until it reaches 100 cooling airflow 4 Humidifier contacts close when the blower starts 5 AFC energize...

Page 8: ...H DFWLYH DQG KLVWRULFDO IDXOWV FDQ DOVR EH DFFHVVHG WKURXJK WKH OHUW 0HQX LQ WKH LVSOD VVHPEO OHDULQJ DXOW LVWRU 2SWLRQ 6FUROO WR WKH OHUW 0HQX LQ WKH LVSOD VVHPEO 6FUROO WR WKH OHUW LVWRU VHFWLRQ 6FUROO WR WKH OHDU LVWRU VHOHFWLRQ DQG SXVK WKH QWHU NH W WKH UH RX 6XUH TXHVWLRQ SXVK WKH QWHU DJDLQ 2SWLRQ 3UHVV DQG KROG WKH 8QLW 7HVW XWWRQ IRU VHFRQGV 5HOHDVH WKH 8QLW 7HVW EXWWRQ DQG ZDLW VHFRQGV F...

Page 9: ...0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV WRQV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV WRQV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV DFWRU 6HWWLQJ 6WDWXV ZLOO EOLQN RQFH SHU 0 UHTXHVWHG Q WRUTXH PRGH DFWXDO DLUIORZ PD EH ORZHU 7RUTXH PRGH ZLOO UHGXFH DLUIORZ ZKHQ VWDWLF LV DERYH DS...

Page 10: ... DWWV 1 1 0 WRQ 0 DWWV 0 WRQ 0 DWWV 1 1 0 WRQ 0 DWWV 0 WRQ 0 DWWV 1 1 0 WRQ 0 DWWV 0 WRQ 0 DWWV 1 1 0 WRQ 0 DWWV WRQV 0 WRQ 0 DWWV 1 1 0 WRQ 0 DWWV 0 WRQ 0 DWWV 1 1 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV DFWRU 6HWWLQJ 6WDWXV ZLOO EOLQN RQFH SHU 0 UHTXHVWHG Q WRUTXH PRGH DFWXDO DLUIORZ PD EH ORZHU 7RUTXH PRGH ZLOO UHGXFH DLUIORZ ZKHQ VWDWLF LV DERYH DSSUR LPDWHO ZDWHU FROX...

Page 11: ...WV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV D 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV WRQV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV DFWRU 6HWWLQJ 6WDWXV ZLOO EOLQN RQFH SHU 0 UHTXHVWHG Q WRUTXH PRGH DFWXDO DLUIORZ PD EH ORZHU 7RUTXH PRGH ZLOO UHGXFH DLUIORZ ZKHQ VWDWLF LV DERYH DSSUR LPDWHO ZDWHU FROXPQ OO KHDWLQJ PRGHV GHIDXOW WR RQVWDQW...

Page 12: ... DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV WRQV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV DFWRU 6HWWLQJ 6WDWXV ZLOO EOLQN RQFH SHU 0 UHTXHVWHG Q WRUTXH PRGH DFWXDO DLUIORZ PD EH ORZHU 7RUTXH PRGH ZLOO UHGXFH DLUIORZ ZKHQ VWDWLF LV DERYH DSSUR LPDWHO ZDWHU FROXPQ OO KHDWLQJ PRGHV GHID...

Page 13: ...RQ 0 DWWV WRQV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV DFWRU 6HWWLQJ 1RW DQ DFWXDO 2 VL H 6WDWXV ZLOO EOLQN RQFH SHU 0 UHTXHVWHG Q WRUTXH PRGH DFWXDO DLUIORZ PD EH ORZHU 7RUTXH PRGH ZLOO UHGXFH DLUIORZ ZKHQ VWDWLF LV DERYH DSSUR LPDWHO ZDWHU FROXPQ I WKH DLU KDQGOHU LV DSSOLHG LQ GRZQIORZ RU KRUL RQWDO FRQILJXUDWLRQV WKH DLUIORZ VKRXO...

Page 14: ... WRQ 0 DWWV WRQV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV 0 WRQ 0 DWWV DFWRU 6HWWLQJ 1RW DQ DFWXDO 2 VL H 6WDWXV ZLOO EOLQN RQFH SHU 0 UHTXHVWHG Q WRUTXH PRGH DFWXDO DLUIORZ PD EH ORZHU 7RUTXH PRGH ZLOO UHGXFH DLUIORZ ZKHQ VWDWLF LV DERYH DSSUR LPDWHO ZDWHU FROXPQ I WKH DLU KDQGOHU LV DSSOLHG LQ GRZQIORZ RU KRUL RQWDO FRQILJXUDWLRQV WKH DLUIORZ VKR...

Page 15: ...PSDFLW 0D LPXP 2YHUORDG 3URWHFWLRQ N 78 N 78 1R HDWHU D 3 1RWH 0RWRU PSV D HDWHU QRW TXDOLILHG IRU 9 ZKHQ LQVWDOOHG LQ KRUL RQWDO OHIW SRVLWLRQ ZLWKRXW HDW 3XPS 7 0 9 HDWHU 0RGHO 1R 1R RI LUFXLWV 9ROW 9ROW DSDFLW HDWHU PSV SHU LUFXLW 0LQLPXP LUFXLW PSDFLW 0D LPXP 2YHUORDG 3URWHF WLRQ DSDFLW HDWHU PSV SHU LUFXLW 0LQLPXP LUFXLW PSDFLW 0D L PXP 2YHUORDG 3URWHF WLRQ N 78 N 78 1R HDWHU 3 3 LUFXLW D LUF...

Page 16: ...LW LUFXLW D LUFXLW 1RWH 0RWRU PSV D 0 DQG 023 IRU FLUFXLW FRQWDLQV WKH PRWRU DPSV 7 0 9 HDWHU 0RGHO 1R 1R RI LUFXLWV 9ROW 9ROW DSDFLW HDWHU PSV SHU LUFXLW 0LQLPXP LUFXLW PSDFLW 0D LPXP 2YHUORDG 3URWHFWLRQ DSDFLW HDWHU PSV SHU LUFXLW 0LQLPXP LUFXLW PSDFLW 0D LPXP 2YHUORDG 3URWHFWLRQ N 78 N 78 1R HDWHU 3 3 LUFXLW D LUFXLW LUFXLW D LUFXLW 1RWH 0RWRU PSV D 0 DQG 023 IRU FLUFXLW FRQWDLQV WKH PRWRU DPSV...

Page 17: ...WHU PSV SHU LUFXLW 0LQLPXP LUFXLW PSDFLW 0D LPXP 2YHUORDG 3URWHFWLRQ DSDFLW HDWHU PSV SHU LUFXLW 0LQLPXP LUFXLW PSDFLW 0D LPXP 2YHUORDG 3URWHFWLRQ N 78 N 78 1R HDWHU 3 3 LUFXLW D LUFXLW LUFXLW D LUFXLW E LUFXLW D LUFXLW LUFXLW 1RWH 0RWRU PSV D 0 DQG 023 IRU FLUFXLW FRQWDLQV WKH PRWRU DPSV E HDWHU QRW TXDOLILHG IRU 9 ZKHQ LQVWDOOHG LQ KRUL RQWDO OHIW SRVLWLRQ ZLWKRXW HDW 3XPS N No ot te e See Produ...

Page 18: ...7 0 9 7 Û 7 0 9 7 Û 7 0 9 7 Û 7 0 9 7 Û 7ZR RPSUHVVRU 6WDJH 3 7 0 9 77 Û 7 0 9 77 Û 7 0 9 77 Û 1RWHV 9DULDEOH 6SHHG 2XWGRRU XQLWV PXVW EH FKDUJHG SHU WKH RXWGRRU XQLW LQVWUXFWLRQV OO RWKHU PDWFKHV PXVW EH FKDUJHG SHU WKH QDPHSODWH FKDUJLQJ LQVWUXFWLRQV DISTANCE FROM BELLY BAND TO SHAFT FACE OF MOTOR FOR MINIMUM VIBRATION WHEEL BLOWERHOUSING MOTOR A A isdetermined per chart Wheel iscentered in Blow...

Page 19: ...2 J4 OPEN TEST CLOSE STATUS LED BM LED COMM LED Unit Test J3 J6 J1 To EEV Stator To Internal Condensate Switch Optional GT Sensor ET Sensor J2 13 8 VDC Distribution Board J7 Motor J8 24 VAC Input J9 Display Assembly J5 External Switch J12 Humidifier Low Voltage thermostat harness STATUS LED FAULT LED UNIT LED N No ot te e Low voltage harness ships in supplied document pack ...

Page 20: ...Q STATUS LED BM LED COMM LED 200 0 5 6 5 37 21 HYLFH RXQW LQ RPPXQLFDWLQJ 0RGH 2II LQ 9ROW 0RGH 1XPEHU RI FRPPXQLFDWLQJ GHYLFHV D 67 786 5 1 6 5 37 21 2Q VROLG IRU VHFRQGV DIWHU SRZHU XS WKHQ IODVK SHU VHFRQG 5HIHUHQFH WKH 6 GLVSOD IRU DLUIORZ 1RUPDO RSHUDWLRQ D DPSOHV FRPPXQLFDWLQJ WKHUPRVWDW FRPPXQLFDWLQJ DLU FOHDQHU HWF ...

Page 21: ...VRU RSHQ VKRUWHG XQSOXJJHG ZLULQJ KDUQHVV SUREOHP 9HULI 9 RXWSXW IURP FRQWURO 6WHSSHU 0RWRU RLO LV VKRUWHG E DXOW 9 PRWRU ZLULQJ KDUQHVV 9DOYH LV QRW UHVSRQGLQJ WR D FKDQJH LQ SRVLWLRQ 3RVVLEOH VWXFN YDOYH 3RVVLEOH VWXFN YDOYH FKHFN 7 7FDOLEUDWLRQ LJK VXSHUKHDW RZ FKDUJH RU UHVWULFWLRQ 6 VWHP ORZ RQ FKDUJH OLTXLG OLQH UHVWULFWLRQ 7 7 VHQVRU FDOLEUDWLRQ RZ VXSHUKHDW KHFN DLUIORZ SRVVLEOH VWXFN YDOY...

Page 22: ...AM9 7 Segment Display Fault Codes DXOW RGHV FDQ EH UHDG IURP WKH VHJPHQW GLVSOD RQ WKH DLU KDQGOHU ERDUG 1RWH RU WKH 7 0 DLU KDQGOHU DOO RI WKH IDXOW FRGHV FDQ EH UHDG IURP WKH SELECT Button 7 Segment Display LIST Button ...

Page 23: ...55 55 8VHU LVSOD OHFWULF KHDW FRQILJXUDWLRQ HUURU UHFHLYHG D KLJKHU UHTXHVW WKDQ ZDV FRQILJXUHG IRU QGRRU HOHFWURQLF H SDQVLRQ YDOYH PRWRU IDXOW 9 075 55 55 55 8VHU LVSOD 9 PRWRU IDXOW KDV EHHQ GHWHFWHG IRU FRQVHFXWLYH WLPHV DQG YDOYH LV ORFNHG RXW DXOW 9 PRWRU ZLULQJ KDUQHVV QGRRU HOHFWURQLF H SDQVLRQ YDOYH PRWRU IDXOW 9 075 55 55 55 8VHU LVSOD 9 HOHFWULF PRWRU FXUUHQW LQGLFDWHV RSHQ RU VKRUW DXO...

Page 24: ...6 VWHP RZ VXSHUKHDW 6WXFN YDOYH 7 7 VHQVRU FDOLEUDWLRQ UHVWULFWHG GLVWULEXWRU OLQH WKDW 7 LV FRQQHFWHG WR OHDNLQJ LQGRRU FKHFN YDOYH QGRRU HOHFWURQLF H SDQVLRQ YDOYH FRQWURO LV QRW FRQWUROOLQJ EHFDXVH RXWGRRU VWDWXV LV XQNQRZQ 2 7 0 66 55 55 8VHU LVSOD 2 VWDWXV XQNQRZQ WR 9 I RPP RQ 2 XQLW LV IODVKLQJ WKH FRUUHFW GHYLFH FRXQW UHSODFH RPPXQLFD WLRQ LQDFWLYH IDXOW 200 55 55 55 ULWLFDO ORZHU RPPXQLFD...

Page 25: ...SF 1D EN 25 Sensor Locations GasTemperature Sensor GT located on copper section of manifold black wires EvaporatorTemperature Sensor ET located on 3 8 Aluminum distributor tube orange wires EEV Stepper Motor ...

Page 26: ...XVH ZLWK RPPRQ 7HUPLQDO WR 7HUPLQDO 0HDVXUHPHQW RPPRQ 7HUPLQDO WR 7HUPLQDO 0HDVXUHPHQW UD 2UDQJH RKPV URZQ OXH RKPV UD 5HG RKPV URZQ HOORZ RKPV UD HOORZ RKPV 5HG 2UDQJH RKPV UD ODFN RKPV 5HG KLWH RKPV FIG 1 5 GRAY common 4 BLACK 3 YELLOW 2 RED 1 ORANGE 5 BROWN common 8 RED common 4 BLUE 3 ORANGE 2 YELLOW 1 WHITE FIG 2 ...

Page 27: ...Status LED will be flashing 2 Gauges should indicate suction pressure dropping Valve is working LPCO may trip N No ot te e The Close Valve Test will exit after 1 5 minutes 90 seconds and will not reinitiate requires a break and make to initialize To clear faults stored in memory apply a jumper between Close and Test pins for 10 seconds O Op pe en n V Va al lv ve e T Te es st t Touch OPEN pin to TE...

Page 28: ...C42 C29 R22 C38 C32 C33 D12 R27 R20 C16 R83 D20 R15 R14 L1 C37 R3 D1 R43 R12 R26 C36 R48 R78 R72 C30 R73 R77 R59 D8 R5 R19 R40 D5 R44 L2 MOV1 J2 R9 L3 C1 C4 Q4 J1 J6 Q1 Q2 Q3 MH3 MH2 J3 V GND OVR B Z GAS TEMP FLOW 12V GND TEMP EVAP A Y J3 OVR GAS TEMP FLOW 12V GND TEMP EVAP J3 GT S ensor SeeTable Above Test Pin Pin ETSensor GASTEMPtest point EVAPTEMPtest point KHQ PHDVXULQJ YROWDJH XVH YDS 7HPS DQ...

Page 29: ... Up Down menu keys simultaneously for 10 seconds To Exit the technician menu section press the Up Down menu keys simultaneously for 10 seconds To move to the top of any menu tree press the Left Right menu keys simultaneously for 1 2 seconds Press the Left Right menu keys a second time for 1 2 seconds to return to the Home Screen While in a technician menu after 5 minutes of inactivity the Home Scr...

Page 30: ...ote 1 System Status will rotate automatically with active alerts Only alerts with a notification level of aUser or Critical re shown same as the thermostat up to four 4 alerts will be shown most recent first Note 2 Alerts shown will be only AFC faults for initial release Specific control alerts are in Alert menu section SYSTEM STATUS Messages o STANDBY Idle no demand is present o FAN Continuous fa...

Page 31: ...Monitor menu allows the technician to monitor the different aspects of the system while the air handler is running No changes can be made in the Monitor Menu Superheat is only shown in cooling and defrost modes Airflow Data o The letters ESP External Static Pressure will appear when the control mode of the motor is Constant Torque and the calculated CFM is greater than 50 CFM from the demand Allow...

Page 32: ...tions for the components are o AF Air Flow control o EV Expansion Valve control o DA Display Assembly The second line of text contains any action that may take place because of the fault and the order that the faults occurred Some faults will shut down all or part of the system See the System Actions below o AH Auxiliary Heat is prohibited electric or hydronic o CH Compressor Heat is prohibited o ...

Page 33: ...er size availability is based on unit size for this menu The OD unit type must be configured for 24 volt systems only o 1 1 is a single stage single compressor OD unit o 2 1 is a two stage single compressor OD unit o 2 2 is a dual stage dual compressor OD unit Continuous fan can be set between 35 100 in 5 increments The External Switch is to be configured independently for heating and cooling mode...

Page 34: ...te control o First value is current selection Second value is actual airflow o Use left or right menu keys to decrease or increase airflow in 100 CFM increments o Press ENTER to initiate new CFM demand Actual airflow is updated every six seconds NOTE EVC TEST and or AUX HEAT TEST will be skipped if the associated control s id are not discovered UNIT TEST Press Enter key to initiate test Unit must ...

Page 35: ...TAM9 SF 1D EN 35 Troubleshooting ...

Page 36: ...YES Does suction pressure go down EEV and coil are working Replace EVC Check operation YES YES Perform temperature sensor check YES NO Replace EEV Check operation Ohm coil per Stepper Motor Tables NO Is ohm reading correct YES Replace EEV Stepper Motor NO The system is running at maximum capacity and thismay be causing the highsuperheat Wait until theindoor temperature is less that 80F and check t...

Page 37: ...own device installed Yes Device wired in series with R or aux contacts No No Yes No No Yes System has proper Superheat Rewire shutdown device Retest To A STEP 3 Is indoor motor running Correct issue and retest for Low Superheat No System has proper Superheat To A Yes Yes No System is clean and free of debris No No Yes Yes Correct and retest for Low Superheat System has proper Superheat To A P2 T T...

Page 38: ...test for Low Superheat Yes No No Yes System has proper Superheat To A STEP 6 Cycle system power and check subcooling STEP 7 Subcooling is high Yes Adjust to specifications prescribed in OD Service Facts and retest for Low Superheat System has proper Superheat Yes To A No No Sucooling is low Yes Add refrigerant per specifications prescribed in OD Service Facts Subcooling is low No No Yes P3 Note th...

Page 39: ...oting Low Superheat process is complete clear all EVC Board Fault Codes If Low Superheat condition has NOT been resolved contact your FSR or local distributor for further assistance 1 FrostTest Procedures 1 Remove Sensor harness from Connector J3 on Electronic Expansion Valve Control Board 2 Remove Coil panel 3 Run System cooling in highest stage available 4 Observe frost pattern on all Distributo...

Page 40: ...pplications For more information please visit www trane com or www americanstandardair com The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications without notice We are committed to using environmentally conscious print practices TAM9 SF 1D EN 08 Apr 2020 Supersedes TAM9 SF 1C EN February 2018 2020 ...

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