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Carrier FA4ANF, Service Manual, Page: 15 / 52

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Carrier FA4ANF Service Manual Download Page 15

Fig.

11—Time

Delay-Off

Relay

Kit

A97030

W3

W2

E

G

C

CB

1

2

3

2-05868-3A

TIME DELAY

RELAY WIRING

LOW VOLTAGE BOARD

L

FR

CB

FAN RELAY

CIRCUIT BOARD

TDR

TIME DELAY RELAY

MARKED TERMINAL

UNMARKED TERMINAL

FIELD CTRL WIRING

FACTORY POWER WIRING

FIELD POWER WIRING

AUX

1

AUX

2

F4

24 VDC

TDR

YEL

FAN COMMON

UNUSED LEAD

UNUSED LEAD

BLK

208/240 VAC

COM

NO

NC

F3

F2

L2

F1

O

Y

R

TRANSFORMER

AC

LINE

T1

T2

COMMON

COMMON

DUMMY

T3

L2

L1

F1

F2

F3

F4

2FC-1

HK61GA001

G

C

C

AUX1

AUX2

EAC2

FAN

EAC1

L

O

Y

R

C

G

E

W2

W3

TO FAN MTR

SPEED TAP

VIO

BRN

YEL

YEL

BLK

BRN

VIO

FAN 

MOTOR

COMMON 

LEAD

FAN 

MOTOR

SPEED-TAP 

LEAD

15

Summary of Contents for FA4ANF

Page 1: ...ing FK4C FV4A 40FKA Motor and Controls 33 Accessories 35 THERMOSTATIC EXPANSION VALVES TXV 36 Problems Affecting TXV 36 PISTON BODY CLEANING OR REPLACEMENT 36 LIQUID TUBE STRAINER 37 FA FB FC FK COIL...

Page 2: ...1 The low voltage stripped leads are used to connect the 24 v side of transformer to indoor thermostat and outdoor section 2 A 5 amp fuse is used to protect the low voltage transformer secondary 3 The...

Page 3: ...w 2 Downflow 3 Horizontal 4 Multipoise 5 Upflow Downflow Airflow 018 1 1 2 Ton 024 2 Ton 001 Multi Tons 002 Multi Tons Etc Cooling Size 10th 11th 12th Positions Fan Coil 005 010 Etc Heating Size KW 6t...

Page 4: ...gether If independent staging is desired consult outdoor ther mostat installation instructions or corporate thermostat instruc tions Step 3 Troubleshooting the Printed Circuit Board Use wiring schemat...

Page 5: ...itch Black wire should be connected to pin number 7 of plug and to sequencer relay number 1 3 Check incoming high voltage power leads If these are not receiving power system cannot function If Transfo...

Page 6: ...de DC power for the fan relay and the first stage of electric heat W2 W3 or E Fig 3B FF1D Typical Wiring Diagram A98229 SEE NOTE 7 F 1 NO NC SPT OUTDOOR UNIT G PCB BLK C INDOOR THERMOSTAT BARRIER C T...

Page 7: ...primary or high side of the transformer The blue wire is connected to T3 for 208 v applications The red wire is connected to T3 for 230 v applications Units are factory wired at 230v The T2 terminal i...

Page 8: ...EWER ELEMENTS AND COMPONENTS 9 1 PHASE HEATERS ARE SHOWN WIRED FOR SINGLE SUPPLY CIRCUIT 10 USE 60 AMP CLASS K FUSES ONLY FOR REPLACEMENT 11 3 SPEED MOTOR SHOWN OPTIONAL 2 SPEED MOTOR USES HI BLK AND...

Page 9: ...4 Replace low voltage fuse with no greater than 5 amp fuse 5 Use 60 amp class K fuses only for replacement 6 3 speed motor shown Optional 2 speed motor uses HI BLK and LOW BLU or RED 7 Connect R to R...

Page 10: ...Fig 10 shows proper connection for latent capacity control kit Note that it is connected in the same manner as 2 speed fan relay kit but with relay connected to humidistat orange wires c Time delay of...

Page 11: ...ck sequencer number 1 and the plug s wiring the yellow wire should be connected to pin number 9 of the plug and the limit switch A black wire should be connected to pin number 7 of the plug and to seq...

Page 12: ...FUSE MAX FAN TDB YEL LS 5 HTR5 BLK BLK 10 9 YEL FU5 FU6 SEQ 3 LS 6 HTR6 BLK BLK 12 11 YEL LS 5 HTR5 BLK BLK 6 5 YEL FU3 FU4 SEQ 2 LS 4 HTR4 BLK BLK 8 7 YEL LS 1 HTR1 BLK BLK BLU MED BLU MED RED LO RED...

Page 13: ...G RED FR LOW MTR SPD HI MTR SPD FAN COMMON UNUSED LEAD BLK 208 240 VAC COM NO NC F3 F2 L2 F1 O Y R T R A N S F O R M E R A C L I N E T 1 T 2 C O M M O N C O M M O N D U M M Y T 3 L 2 L 1 F 1 F 2 F 3 F...

Page 14: ...LD POWER WIRING AUX 1 AUX 2 F4 24 VDC RED FR LOW MTR SPD HI MTR SPD FAN COMMON UNUSED LEAD BLK 208 240 VAC NO C HST ORG ORG COM NO NC F3 F2 L2 F1 O Y R T R A N S F O R M E R A C L I N E T 1 T 2 C O M...

Page 15: ...WIRING FIELD POWER WIRING AUX 1 AUX 2 F4 24 VDC TDR YEL FAN COMMON UNUSED LEAD UNUSED LEAD BLK 208 240 VAC COM NO NC F3 F2 L2 F1 O Y R T R A N S F O R M E R A C L I N E T 1 T 2 C O M M O N C O M M O...

Page 16: ...NG AUX 1 AUX 2 F4 24 VDC TDR FR ORG ORG RED YEL FAN COMMON UNUSED LEAD LOW MTR SPD HI MTR SPD BLK 208 240 VAC COM NO NC F3 F2 L2 F1 O Y R COM NO NC T R A N S F O R M E R A C L I N E T 1 T 2 C O M M O...

Page 17: ...MAX AUX2 L1 EAC1 FAN R L G E C O Y W2 INDOOR THERMOSTAT YEL YEL BLK LS 3 HTR3 BLK BLK 6 5 YEL FU1 FU2 FU3 FU4 SEQ 2 LS 4 HTR4 BLK BLK 8 7 YEL LS 1 HTR1 BLK BLK 2 1 YEL SEQ 1 LS 2 HTR2 BLK BLK 4 3 SEQ...

Page 18: ...incoming high voltage power leads If these are not receiving power the system cannot function If the PCB has high voltage applied to it 1 Check the low voltage transformer leads R and C Make sure they...

Page 19: ...ensure that it is replaced with a limit switch of identical opening temperature and closing differential Limits switches are typically color coded to identify their range KFA AND KFB SEQUENCER The seq...

Page 20: ...ters or undersized duct 2 Check blower motor and wheel for proper operation Exces sive current draw of motor will cause internal overload to trip 3 The fan speed may be low FAN COIL DESCRIPTION AND TR...

Page 21: ...eed A circuit from R to Y1 is also required for 2 speed high The Y Y2 signal is sent directly to ICM2 COOLING MODE TWO SPEED LOW Thermostat closes circuits R to Y1 and R to O heat pump only The Y1 sig...

Page 22: ...or erratic motor operation can result TRANSFORMER MOTOR AND ELECTRIC HEATER POWER CONNECTIONS The high voltage 230 vac power input to board is provided through electric heater connector pins 7 and 9...

Page 23: ...or heat pump size is largest unit meant for application with model of fan coil purchased The installer needs to select air conditioner or heat pump size to ensure that airflow delivered falls within p...

Page 24: ...UX2 Low voltage output for auxiliary option 24 vdc 0 187 X 0 032 M1 Common connection to blower motor T1 Common connection for transformer RED Common to R screw terminal and SEC2 Table 4 Connections o...

Page 25: ...Blown Diodes If diodes are blown it is probable that electric heater plug is miswired Correct miswiring NOTE Board will need to be replaced if diode is bad If Traces Are Overheated on Back of PCB Usua...

Page 26: ...L RECP 3 RECP 4 ICM BRN YEL RED VIO RED ORN BRN VIO ORN GRY BLU BLK BLK 1 9 2 10 3 11 4 12 5 13 6 14 7 15 8 16 PLUG 2 BLK YEL ORN GRN RED BRN VIO SEE NOTE 3 SEE NOTE 2 HPTB E Y1 Y0 W2 O L R NOTES 1 Us...

Page 27: ...g and turn on power Check for 24v between pin 1 and pin 12 on the 16 pin plug See Fig 19 If no voltage is present replace wiring harness If voltage is present jumper screw terminal R Y Y2 on circuit b...

Page 28: ...uct Data for static pressure limits The ICM2 is pre programmed and contains airflow tables for all modes of operation Blower characteristics requested airflow torque and speed are known from laborator...

Page 29: ...let Wire AC HP Size Blue Wire Type Orange Wire AC HP CFM Adjust Black Wire AC HP Time Delay Grey Wire Continous Fan Yellow Wire Step 11 Sequence of Operation CONTINUOUS FAN MODE The thermostat closes...

Page 30: ...R to Y1 is also required for 2 speed high Y Y2 and Y1 signal is sent to ICM2 Thermidistat call for Comfort Heat will occur between 10 and 40 F outdoors and opens circuit from R to G ICM adjusts airfl...

Page 31: ...rness to motor The C side of low voltage control power circuit is connected by printed circuit runs to motor connector pins 9 10 and 11 then through motor control harness to motor LOW VOLTAGE CIRCUIT...

Page 32: ...urchased The installer needs to select air conditioner or heat pump size to ensure that airflow delivered falls within proper range for size of unit installed in all operational modes See Fig 24 SYSTE...

Page 33: ...When there is a high current drawn on transformer it is most likely because transformer has been shorted or system is trying to draw more va than transformer rating allows When fuse blows because of h...

Page 34: ...BLK WHT PLUG 3 230V 208V Com YEL BLK BLK YEL ICM RECP 4 RECP 3 GRY 1 BRN 12 11 10 9 8 7 6 5 4 3 2 1 5 4 3 2 1 G R N Y E L B L K W H T RED VIO V I O R E D B R N O R N BRN PLUG 1 G R Y 16 15 14 13 12 11...

Page 35: ...air cleaner when G or W are present See Fig 28 FK4C FV4A AND 40FKA DE HUMIDIFY MODE NOTE Humidistat must open on humidity rise Latent capacities for systems using the FK4C FV4A and 40FKA fan coils ar...

Page 36: ...m with which the pin carrier spring pressure closes valve The refrigerant flow is effectively stabilized to load demand with negligible change in superheat The bi flow TXV is used on split system heat...

Page 37: ...ndensate drain pan Remove fitting panel 7 Remove any shipping clips including horizontal pan clip and slide coil condensate pan assembly out of unit 8 Upflow or Horizontal Applications Only Remove hor...

Page 38: ...nditioners and Heat Pumps Service Manual for further information FX4A AND FV4A COIL CONDENSATE PAN REMOVAL AND REPLACEMENT PURON REFRIGERANT Step 1 A Coil Units If it is determined that system does no...

Page 39: ...12 Remove coil top seal See Fig 32 13 Install new coil into condensate pan using 2 original screws and 2 support columns NOTE Correct coil position in condensate pan is essential to reliable operatio...

Page 40: ...bolts Make sure mount or motor is grounded to blower housing 4 Locate blower wheel setscrew over flat on motor shaft Rotate wheel in housing It should not rub housing and should be centered in inlet o...

Page 41: ...LK BLK HTR LS YEL VIO BLK BLK RED BLU TRANS DISCONNECT SEE RATING PLATE FOR VOLTS HZ FIELD POWER SUPPLY CHASSIS GROUND RED VIO ORN BRN BRN CHASSIS GROUND RED ORN T A P2 B BRN BRN 5 6 SEQ CHASSIS GROUN...

Page 42: ...hanical equipment personal injury can result from sharp metal edges Be careful when removing parts AIR FILTER To clean or replace air filter grasp it at bottom and lift it out of unit Clean filter usi...

Page 43: ...n lead is yellow NOTE Unused fan speed leads must be tapped off to prevent direct short to cabinet surface The motor is turned on through 2 different routes The first occurs when thermostat calls for...

Page 44: ...SFORMER PIGTAILS BLUE 208V RED 230V INSULATE UNUSED LEAD 2 FAN MOTOR PIGTAILS RED LOW BLACK HIGH INSULATE UNUSED LEAD 3 FAN MOTOR THERMALLY PROTECTED 4 SUITABLE FOR USE WITH COPPER OR COPPER CLAD ALUM...

Page 45: ...edges Be careful when removing parts The minimum maintenance requirements for this equipment are as follows 1 Inspect and clean or replace field supplied air filter each month or as required 2 Inspec...

Page 46: ...can result from sharp metal edges Be careful when removing parts RETURN AIR FILTER To clean or replace air filter remove screws and filter access door Slide out filter For washable type filters clean...

Page 47: ...ally connected to equip ment ground Step 2 Unit Functions TRANSFORMER NOTE Terminals T1 T2 if used and T3 are wired to primary or high side of transformer The 208 v terminal or blue wire if transforme...

Page 48: ...elements For troubleshooting a service LED indicates condition of PCB See Table 11 for LED flash codes Step 4 Electrical Operating Sequences and Troubleshooting NOTE Refer to Table 12 for proper inpu...

Page 49: ...ergized control energizes fan motor It may run on high or low speed depending on its operation in previous cycle Compressor operation in current cycle is monitored by the smart control to determine wh...

Page 50: ...ircuit of sequencer relay place voltmeter leads across sequencer relay terminal 4 of sequencer relay 1 and terminal 4 of limit switch 3 The reading should be 208 230v and heater should be energized If...

Page 51: ...uld be designed to detect HFC refrigerant Puron R 410A as other HFC s is only compatible with POE oils Vacuum pumps will not remove moisture from oil Do not use liquid line filter driers with rated wo...

Page 52: ...YEL COM CAP BRN FM BRN GRN YEL GND BLK HI BLU MED BRN RED TRAN MOTOR SPEED AT 20 KW FAN COIL SIZE MINIMUM MOTOR LO SPEED TAP SELECTION NOTES LS2 LS1 RED SEQ3 SEQ2 SEQ 2 9 10 BLK 7 LS2 YEL 8 BLK HTR2...

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