Carrier 48TJD Specifications download pdf (Page 51)

I_-INDO(:W_FANI)EI.AY J___(HEATING)

2 _S - OFmNING OF LIMffSWRCH

3 _S - _ 81_813f1

IN_CATES FLAME WITH

CLOSED C:':':':':':':':':_VALVE

4 FI.ASI'E8 - LIW_ SWITCH

CYCLED 4 TIMES ON SINGLE

CALL FOR HEAT

(No _ wth_ 15 _)

6 FI.ASHES- iNDUCEDDRAFT

MOTORFAULT

(NOsigr_ frem f_'_ _ !_t

8enm:,rforB0mKx_,es)

I 7 _ - OPtENING OFROLLCtrr 8_MICH

SOFTWARE FAULT

I 9 FLASHES - SOFTWARELOCKOUT

F

I , I

I_ OU113OOR FAN MOTOR

STeEr I_TELY

I. I

, ,FOR iNDOOR FAN I

I COOLING DEMAND

t

OUIDOOR F/M_STOP

IMMEDIATELY

I ;GC SAFELY LOGIC WILL SHUT

OFF GAS VALVE AND sPARK

4,

Y_

LEGEND

IGC -- Integrated Gas Unit Controller

NOTE: Thermostat Fan Switch in the "AUTO"

position.

--_ OFF YES IGC BOARD

I , BLOWN 5 AMP FUSE

2. DEFECTIVE _V TRANS.

& BROKB_ V_IRE

1L & NO POWB_ TO U_T

HEATING

I

I

I

'Wl' FROM BASE CONTROL BOARD ENERGIZES 'W'

ON IGC - 1 MINUTE LOCK-ON

RELAY ON _C B EN_

I

I

I

t

t,

1 _ _ B_N.o ATCO_-CT_ (ATLEA-__0.P_, _L I

EE--CT 8EN8OR SENDS CORRECT 81GNAL TO _ 'Jf ON K3C

F LIMIT swrrcH AND ROLLOUT

9A,TI'CH ARE CLOSED, IGC _

LOGIC _ INITIATIE IGNITION

SEQUENCE

_ _I"ES A

10,000 Vt3LT 8PN_K FO_ 5

I

Yes

I _FrER_OONI_(O_LESS.:T_ETI_e I

H_S BEEN R_ D_J_ TO _ 81/_TCH

TRIPS) tGC _MLL B_ERGIZE BLOWISR RELAY

I _3c SAFEW LO_C OPENS GAS

VALVE FOR 5 SEONOS

I

No

t

I _,, s_.._Er_ LO_C_._rsOFF_ VALVE I

I 45 SECOND BLOWER SHUTOFF DELAY I

(DELAY _ BY 5 880OND8 FOR ESE;H UMfr 8w_roH TRP -

MAXIMUM DELAY: 3 MINLrlEs)

!

SUBTRACT 5 S_CONDS (OR J

5 _:CONDS) FROM

J

_DOOR F_ ON TIME DE_AY

Fig. 60 -- IGC Control (Heating and Cooling)

51

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