ICP DLF4AH12J1A User Manual

421 01 9204 00 1/03/13
SERVICE MANUAL
R−410A Ductless Split System
Air Conditioner and Heat Pump
MODELS: DLC4(A/H)−Outdoor, DLF4(A/H)−Indoor
SIZES: 9K, 12K, 18K, 24K, 30K, and 36K
INTRODUCTION
This Service Manual provides the necessary information to
service, repair, and maintain the DLF4(A,H), DLC4(A/H)
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1........................
SPECIFICATIONS 2..................................
MODEL / SERIAL NUMBER NOMENCLATURE 16.......
STANDARD FEATURES AND ACCESSORIES 17........
DIMENSIONS 18.....................................
CLEARANCES 22....................................
SYSTEM OPERATING ENVELOPE 23..................
ELECTRICAL DATA 25...............................
CONNECTION DIAGRAMS 26.........................
WIRING DIAGRAMS 27...............................
REFRIGERATION SYSTEM DIAGRAM 36...............
REFRIGERANT LINES 38.............................
SYSTEM EVACUATION AND CHARGING 39............
CONTROL SYSTEM 40...............................
MODES OF OPERATION 44...........................
TROUBLESHOOTING 47.............................
DIAGNOSTIC CHARTS 48............................
MALFUNCTION ANALYSIS 55.........................
APPENDIX 79.......................................
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air−conditioning
equipment can be hazardous due to system pressures,
electrical components, and equipment location (roofs,
elevated structures, etc.).
Only trained, qualified installers and service mechanics
should install, start−up, and service this equipment.
Untrained personnel can perform basic maintenance
functions such as cleaning coils. All other operations should
be performed by trained service personnel.
When working on the equipment, observe precautions in the
literature and on tags, stickers, and labels attached to the
equipment.
Follow all safety codes. Wear safety glasses and work
gloves. Keep quenching cloth and fire extinguisher nearby
when brazing. Use care in handling, rigging, and setting
bulky equipment.
Read these instructions thoroughly and follow all warnings
or cautions included in literature and attached to the unit.
Consult local building codes and National Electrical Code
(NEC) for special requirements. In Canada, refer to current
editions of the Canadian Electrical Code, CSA 22.1.
Recognize safety information. This is the safety−alert
symbol
!
!
. When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal
injury.Understand these signal words: DANGER,
WARNING, and CAUTION. These words are used with the
safety−alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or death.
WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe
practices which may result in minor personal injury or
product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation,
reliability, or operation.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF
position. There may be more than 1 disconnect switch.
Lock out and tag switch with a suitable warning label.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant
pipe in the ground. If any section of pipe is buried, there
must be a 6 in. (152 mm) vertical rise to the valve
connections on the outdoor units. If more than the
recommended length is buried, refrigerant may migrate
to the cooler buried section during extended periods of
system shutdown. This causes refrigerant slugging and
could possibly damage the compressor at start−up.

ICP DLF4AH12J1A Specifications

General

Brand	ICP
Model	DLF4AH12J1A
Category	Air Conditioner
Language	English

Summary

SAFETY CONSIDERATIONS

WARNING ELECTRICAL SHOCK HAZARD

Warning about electrical shock hazard during installation or servicing.

CAUTION EQUIPMENT DAMAGE HAZARD

Caution regarding equipment damage or improper operation.

PRODUCT SPECIFICATIONS

MODEL NOMENCLATURE

SERIAL NUMBER NOMENCLATURE

Explanation of the serial number structure and its components.

STANDARD FEATURES AND ACCESSORIES

DIMENSIONS – INDOOR

DIMENSIONS – OUTDOOR

CLEARANCES

SYSTEM OPERATING ENVELOPES

ELECTRICAL DATA

WIRING GUIDELINES

Guidelines and requirements for field wiring installation.

CONNECTION DIAGRAMS

WIRING DIAGRAMS

REFRIGERANT SYSTEM DIAGRAM

REFRIGERANT LINES

SYSTEM VACUUM AND CHARGE

USING VACUUM PUMP

Procedure for evacuating the system using a vacuum pump.

DEEP VACUUM METHOD

Method for achieving a deep vacuum (500 microns).

TRIPLE EVACUATION METHOD

Alternate evacuation method using nitrogen.

REMOTE CONTROL AND FUNCTIONS

REMOTE CONTROL DISPLAY (SIZE 09-24)

Description of buttons and display for remote control (09-24K models).

REMOTE CONTROL DISPLAY (SIZE 30-36)

Description of buttons and display for remote control (30-36K models).

FUNCTION AND CONTROLS

COOLING MODE

Explains working conditions and process for cooling mode.

DEHUMIDIFYING MODE

Explains working conditions and process for dehumidifying mode.

HEATING MODE

Explains working conditions and process for heating mode.

DEFROST MODE

Conditions and process for initiating and canceling defrost mode.

AUTO MODE

Explains auto mode operation and temperature settings.

PROTECTION

Details various protection mechanisms for the unit.

COMMON PROTECTION FUNCTIONS AND FAULT DISPLAY

OVERLOAD PROTECTION

Protection against overload conditions for compressor and fan.

EXHAUST TEMPERATURE PROTECTION OF COMPRESSOR

Protection mechanism for compressor exhaust temperature.

COMMUNICATION FAULT

Error handling for communication failures between units.

MODULE PROTECTION

Protection for the internal module against malfunctions.

DETECTION OF TEMPERATURE SENSOR MALFUNCTION

(1) INDOOR TEMPERATURE SENSOR

Detection of indoor temperature sensor malfunctions.

(2) INDOOR PIPE TEMPERATURE SENSOR

Detection of indoor pipe temperature sensor malfunctions.

TROUBLESHOOTING

PRECAUTIONS FOR INSPECTIONS AND REPAIRS

Safety precautions for performing inspections and repairs.

DISPLAY AND INTERPRETATION OF ERROR CODES

Explains how error codes are displayed and interpreted.

MALFUNCTION ANALYSIS

POOR COOL (HEAT) OPERATION

Troubleshooting steps for poor cooling or heating performance.

COMPRESSOR DISCHARGE PROTECTION

Analysis and processing for compressor discharge protection malfunctions.

LOW VOLTAGE OVER-CURRENT PROTECTION

Analysis for low voltage and over-current protection issues.

COMMUNICATION MALFUNCTION

Processing methods for communication malfunctions.

SENSOR OPEN OR SHORT CIRCUIT

How to check sensor open or short circuit malfunctions.

COMPRESSOR OVER LOAD PROTECTION

Analysis for compressor overload protection.

SYSTEM MALFUNCTION

General system malfunctions including overload protection.

IPM MODULE PROTECTION

Processing methods for IPM module protection.

BASIC SYSTEM CHECK

CAPACITOR CHARGE FAULT (OUTDOOR UNIT)

Diagnosis for capacitor charge faults in the outdoor unit.

IPM PROTECTION, OUT-OF-STEP FAULT, COMPRESSOR PHASE OVER CURRENT

DIAGNOSIS FOR HIGH TEMPERATURE, OVERLOAD PROTECTION

DIAGNOSIS FOR FAILURE START UP MALFUNCTION

DIAGNOSIS FOR COMPRESSOR SYNCHRONIZATION

DIAGNOSIS FOR OVERLOAD AND DISCHARGE MALFUNCTION

POWER FACTOR CORRECT OR (PFC) FAULT

COMMUNICATION MALFUNCTION

APPENDICES

APPENDIX 1: RESISTANCE TABLE OF AMBIENT TEMPERATURE SENSOR

Resistance values for ambient temperature sensors at various temperatures.

APPENDIX 2: RESISTANCE TABLE OF OUTDOOR AND INDOOR TUBE TEMPERATURE SENSORS

Resistance values for tube temperature sensors at various temperatures.

APPENDIX 3: RESISTANCE TABLE OF OUTDOOR DISCHARGE TEMPERATURE SENSOR

Resistance values for outdoor discharge temperature sensors.