Carrier FV4ANB User Manual

Residential Fan Coil Units
Service Manual
TABLE OF CONTENTS
Page
SAFETY CONSIDERATIONS...................................................2
INTRODUCTION........................................................................2
UNIT IDENTIFICATION...........................................................2
PRODUCT OFFERING..............................................................4
FAN MOTOR SPEED TAPS .....................................................4
FA4A, FB4A, FC4B, FF1D, FH4A, AND FX4A
CIRCUIT BOARD FUNCTION AND TROUBLESHOOTING
— CES013003-00 and -01 PCB...............................................2-7
• Printed Circuit Board Component Layout and Description.......2
• Unit Functions ............................................................................2
• Troubleshooting PCB..................................................................4
CIRCUIT BOARD FUNCTION AND TROUBLESHOOTING
— HK61GA001 and HK61GA003 PCB .........................6-19
• Printed Circuit Board Component Layout and Description.......6
• PCB Component Functions.........................................................7
• Troubleshooting PCB................................................................11
ELECTRIC HEATER FUNCTION
AND TROUBLESHOOTING..............................................18
• Description of Electric Heater Components.............................19
• Troubleshooting KFA, KFB, KFC, and KFD Series
Electric Heaters.......................................................................20
FAN COIL DESCRIPTION AND
TROUBLESHOOTING — FK4B .................................20-27
• Integrated Controls and Motor (ICM2)....................................20
• PCB Layout and Description....................................................20
• Sequence of Operation..............................................................21
• Easy Select Configuration Taps................................................22
• Troubleshooting PCB................................................................25
• Troubleshooting ICM2..............................................................25
• Condensed Version of Troubleshooting FK4B Motor
and Controls ...............................................................................27
• Accessories ................................................................................27
FAN COIL DESCRIPTION AND
TROUBLESHOOTING — FK4C, FV4A, 40FKA.........28-35
• Integrated Controls and Motor (ICM2)..................................28
• PCB Layout and Description..................................................29
• Sequence of Operation............................................................29
• Easy Select Configuration Taps..............................................32
• Troubleshooting PCB..............................................................33
• Troubleshooting ICM2............................................................33
• Condensed Version of Troubleshooting
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/CONDENSATE PAN
REMOVAL AND REPLACEMENT..........................37-38
• A-Coil Units ............................................................................37
• Slope Coil Units......................................................................37
FX, FV, 40FKA COIL/CONDENSATE PAN REMOVAL
AND REPLACEMENT ................................................38-40
CARE AND MAINTENANCE...............................................39
• Filter Assembly .......................................................................39
• Cooling Coil, Drain Pan, and Condensate Drain...................39
• Blower Motor and Wheel .......................................................40
FF1A/FF1B/FF1C SERVICE AND
TROUBLESHOOTING................................................40-42
• Fan Motor................................................................................40
• Electric Heater Service............................................................40
• Cleaning or Replacing Refrigerant Flow-Control Device .....42
• Liquid Tube Strainer ...............................................................42
• Sequence of Operation............................................................42
• Care and Maintenance.............................................................42
FD3A SERVICE AND TROUBLESHOOTING...............43-45
• Fan Motor..................................................................................43
• Electric Heater Service..............................................................43
• Cleaning or Replacing Refrigerant Flow-Control Device .......43
• Liquid Tube Strainer .................................................................45
• Care and Maintenance...............................................................45
FG3A SERVICE AND TROUBLESHOOTING....................46
• Service .......................................................................................46
• Maintenance...............................................................................46
FA4A, FB4A, FC4B, FX4A SMART HEAT CIRCUIT
BOARD FUNCTION AND TROUBLESHOOTING..46-50
• PCB Component Layout, Description, and Function...............46
• Unit Functions ...........................................................................47
• Smart Heat Operation................................................................48
• Electrical Operating Sequences and Troubleshooting..............48
PURON® (R-410A) QUICK REFERENCE GUIDE.............51
Fig. 1—Typical Fan Coil
A98023
Visit www.carrier.com
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 3d 2e
PC 101 Catalog No. 03FA-4A3 Printed in U.S.A. Form F-5SM Pg 1 6-99 Replaces: F-4SM

Carrier FV4ANB Specifications

General

Refrigerant	R-410A
HSPF	Up to 10
Voltage	208/230V
Phase	1
Product Type	Air Conditioner

Summary

SAFETY CONSIDERATIONS AND UNIT OVERVIEW

Introduction and Unit Identification

Covers unit basics, identification, product offerings, and fan motor speed taps.

CIRCUIT BOARD FUNCTION AND TROUBLESHOOTING

CES0130003-00 and -01 PCB Details

Examines component layout, functions, and troubleshooting for CES0130003-00/-01 PCB.

HK61GA001 and HK61GA003 PCB Details

Details component layout, functions, and troubleshooting for HK61GA001/003 PCB models.

ELECTRIC HEATER FUNCTION AND TROUBLESHOOTING

Heater Components and Troubleshooting

Explains electric heater components and troubleshooting for KFA, KFB, KFC, KFD series.

FAN COIL DESCRIPTION AND TROUBLESHOOTING

FK4B Series Fan Coil Operation and Troubleshooting

Covers FK4B fan coil description, ICM2, PCB, sequence, and troubleshooting.

FK4C, FV4A, 40FKA Series Fan Coil Operation and Troubleshooting

Details FK4C, FV4A, 40FKA fan coil description, ICM2, PCB, and troubleshooting.

REFRIGERANT FLOW CONTROL AND COIL SERVICE

TXV, Piston Body, and Liquid Tube Strainer

Discusses TXV operation, problems, piston body, and liquid tube strainer.

Coil/Condensate Pan Removal and Replacement

Step-by-step instructions for removing and replacing fan coil units and condensate pans.

CARE AND MAINTENANCE

Routine Maintenance Tasks

Covers filter replacement, coil cleaning, motor inspection, and electrical checks for ongoing upkeep.

SPECIFIC MODEL SERVICE AND TROUBLESHOOTING

FF1A/FF1B/FF1C Service and Troubleshooting

Provides service and troubleshooting guidance for FF1A, FF1B, and FF1C fan coil units.

FD3A Service and Troubleshooting

Offers service and troubleshooting procedures specifically for the FD3A model.

FG3A Service and Troubleshooting

Outlines service and troubleshooting steps for the FG3A model, including motor and blower.

SMART HEAT CIRCUIT BOARD FUNCTION AND TROUBLESHOOTING

PCB Layout, Functions, and Smart Heat Operation

Explains the Smart Heat PCB layout, component functions, and operational logic.

Electrical Operating Sequences and Troubleshooting

Details electrical sequences, voltage readings, and troubleshooting for Smart Heat systems.