Haier AS18PD2LAA Service Manual
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Haier AS18PD2LAA Service Manual

Wall mounted type
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SERVICE MANUAL
Wall Mounted Type
ON/OFF P-Series
Model No. HSU-18LPA03/R2(T3&T4)
AS18PD2LAA
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
●
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
Repair the product or products dealt with in this service information by anyone else could result in serious injury or death
2014 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. U
nauthorized copying and distribution is a violation of law
●
●
Haier Group
Date 2022-11-30
Version V1

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Summary of Contents for Haier AS18PD2LAA

  • Page 1 Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or Repair the product or products dealt with in this service information by anyone else could result in serious injury or death 2014 (Qingdao Haier Air Conditioner General corp. , Ltd) All rights reserved. U nauthorized copying and distribution is a violation of law ●...

  • Page 2: Table Of Contents

    Table fo contents Contents 1. Introduction .................... 1 2. Features ....................7 3. Specifications ..................8 4. Sensors list.................... 9 5. Piping diagrams ..................10 6. Printed Circuit Board Connector Wiring Diagram........11 7. Functions and Control ................8. System configuration................9. Dimensional drawings ................10.

  • Page 3: Introduction

    Introduction 1 Introduction 1.1 Model name explanation Apply toT1; 220~240V50HZ/1ph Cooling only & R410A refrigerant Version number Platform of indoor units:50P Platform Series of indoor units: P-Series Nominal cooling capacity (18000BTU/h) Type of indoor unit: S (wall-mounted) Indoor unit ●...
  • Page 4 Introduction 1.2 Safety Cautions Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “Warning” and “Caution”. The “Warning” items are especially important since they can lead to death or serious injury if they are not followed closely. The “Caution” items can also lead to serious accidents under some conditions if they are not followed.
  • Page 5 Introduction Warning Do not repair the electrical components with wet hands . Working on the equipment with wet hands can cause an electrical shock Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock.
  • Page 6 Introduction Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire. Be sure to use the specified cable to connect between the indoor and outdoor units.
  • Page 7 Introduction Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks. Do not install the equipment in a place where there is a possibility of combustible gas leaks. If a combustible gas leaks and remains around the unit, it can cause a fire.
  • Page 8 Introduction Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure. Improper installation and connections can cause excessive heat generation, fire or an electrical shock. If the installation platform or frame has corroded, replace it.

  • Page 9: Features

    Features 2.Features 4 Fan setting :Select the fan speed LO,MED,HI,AUTO Anti-mold filter: Catches most small particles and remove unpleasant odors effectively. Sleep mode: The setting temperature and the indoor noise can be adjusted to a more comfortable level when you set the “sleep mode” during night sleep. 24Hour timer: Use the timer function to set on,or off,or from on to off,or from off to on Auto restart: Automatic return to previous operation conditions after sudden power blackout Easy clean design: The panel is easy to wash and the airflow vents can be detached easily...

  • Page 10: Specifications

    Specifications 3 Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE a t l 220-240 NOMINAL CAPACITY and NOMINAL INPUT HSU-18LPA03/R2(T3&T4) cooling 5.275(T1)/4.689(T3) Capacity rated Btu/h 18000(T1)/16000(T3) Power Consumption(Ra 1.525(T1)/1.882(T3) 3.458(T1)/2.49(T3) m³/h TECHNICAL SPECIFICATIONS WxHxD 975×318×220 1050×397×301 WxHxD 14.5 White Sound level 48/45/42 Sound peessure(high/medium/low) Liquid Φ6.35*0.65 Piping...

  • Page 11: Sensors List

    Sensors list TECHNICAL SPECIFICATIONS-PARTS cooling Cross flow fan Air flow rate(high) 1100 m³/h Speed(super/high/low) rpm ML fin-φ7HI-HX tube Type Heat exchanger 2* 16*1.4 t i f Right,Left,Horizontal,Downward o i t Removable/Washable/Mildew Proof Air filter Microcomputer Control Temperature control l l o Note: the data are based on the conditions shown in the table below Conversation formulae n i l...

  • Page 12: Piping Diagrams

    Piping diagrams 5 Piping diagrams 12.7 CuT 6.35 CuT...

  • Page 13: Printed Circuit Board Connectorwiring Diagram

    Connector Wiring diagrams 6. Printed Circuit Board ConnectorWiring Diagram Connectors Indoor PCB CN17 Connector for power line L. Connector for DC fan motor. Connector for step motor. CN11 Connector for receiver display. Connector for Temperature sensor Connector for WIFI CN35 Connector for ambient temp.
  • Page 14 Connector Wiring diagrams Connector wring diagram...
  • Page 15 Connector Wiring diagrams Wiring diagrams...

  • Page 16: Functions And Control

    Functions and control 7 Functions and Control 7.1 Main functions and control specification Including brief introduction to air conditioners of series models and electric control function. 7.1.1 Automatic running (1) Single cold automatic run mode: First entering into this mode, the main control “MCU” determines the corresponding work pattern according to the indoor temperature between cooling mode and blowing mode.
  • Page 17 Functions and control 7.1.3 Cooling run mode: temperature control range : 16 ---30 temperature control precision: ± compressor can’t be controlled by temperature sensor within 2 minutes after it starts. control character: when Tr Ts, outlet air from compressor is on and indoor fan motor run at fixed wind speed. When Tr Ts, outlet air from compressor is off , and when Tr >...
  • Page 18 Functions and control State1 State2 State3 Ts-1 Ts+2 Ts+2 When all the ranges alternate, there is ±1 difference. 7.1.5 Heating mode: (cooling only have no the mode) *Temperature control range : 16 —30 * Temperature control precision: 1 *Control Character: When Tr Ts, compressor, four-ways valve and outdoor fan motor is on, indoor fan motor runs as in cold blast mode, and 4...
  • Page 19 Functions and control *Warm blast: If the temperature sensor is off. Compressor stops running. If the temperature of coil pipe is above 23 , fan motor enter breeze mode; and if the temperature of coil pipe is below 20 , fan motor stops running. 7.1.5.2 High temperature protection and high temperature expiration protection: 7.1.5.2.1 High temperature prevention: When the temp.
  • Page 20 Functions and control 7.1.6 Timer function: You can set 24-hour timer on or timer off as required, and the minimum time unit is 1 minute. After setting, the indicator of indoor unit is on , and it is off when timer setting is completed. There are several timer mode as follows. 7.1.5.1 Timer on: The LED of “timer on”...
  • Page 21 Functions and control 7.1.8 Emergency switch input: 7.1.7.1 Press the switch of emergency operation, then buzzer rings once and unit enters the automatic operation mode. (emergency operation) 7.1.7.2 If the switch is kept pressed for 5 seconds, buzzer ring two times and unit enter enter test run mode. 7.1.7.3 Press the switch again, and then closes.
  • Page 22 Functions and control 7.2 Value of thermistor Room sensor R25 =10K ±3% B25 /50 =3700K±3% Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 568.8372 501.0746 440.8435 -1.97 1.75 530.9600 468.6491 413.1441 -1.95 1.74 495.8488 438.5314 387.3645 -1.93 1.72 463.2850 410.5433 363.3602...
  • Page 23 Functions and control Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 66.3062 62.1807 58.2405 -1.24 1.19 62.7992 58.9853 55.3351 -1.22 1.17 59.4984 55.9729 52.5917 -1.20 1.15 56.3905 53.1320 50.0006 -1.17 1.13 53.4631 50.4521 47.5523 -1.15 1.11 50.7048 47.9230 45.2384 -1.13 1.09...
  • Page 24 Functions and control Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 9.6976 9.1130 8.5532 -1.56 1.49 9.3163 8.7439 8.1965 -1.60 1.53 8.9521 8.3916 7.8566 -1.64 1.57 8.6040 8.0554 7.5327 -1.68 1.60 8.2713 7.7345 7.2237 -1.73 1.64 7.9531 7.4280 6.9291 -1.77 1.68...
  • Page 25 Functions and control Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 2.2118 1.9856 1.7803 -3.48 3.16 2.1416 1.9207 1.7204 -3.54 3.20 2.0740 1.8582 1.6628 -3.59 3.25 2.0089 1.7981 1.6074 -3.64 3.29 1.9461 1.7402 1.5541 -3.70 3.34 1.8856 1.6844 1.5028 -3.75 3.38...
  • Page 26 Functions and control Pipe Sensor R25 =10K ±3% B25 /50 =3700K±3% Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 165.2170 147.9497 132.3678 -1.94 1.75 155.5754 139.5600 125.0806 -1.93 1.74 146.5609 131.7022 118.2434 -1.91 1.73 138.1285 124.3392 111.8256 -1.89 1.71 130.2371 117.4366...
  • Page 27 Functions and control Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 23.0284 21.8398 20.6939 -1.18 1.14 21.9714 20.8659 19.7982 -1.15 1.12 20.9688 19.9409 18.9463 -1.13 1.09 20.0176 19.0621 18.1358 -1.11 1.07 19.1149 18.2270 17.3646 -1.08 1.05 18.2580 17.4331 16.6305 -1.06 1.03...
  • Page 28 Functions and control Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 4.3524 4.1145 3.8862 -1.61 1.55 4.2026 3.9686 3.7443 -1.65 1.59 4.0588 3.8287 3.6084 -1.70 1.62 3.9206 3.6943 3.4780 -1.74 1.66 3.7878 3.5654 3.3531 -1.78 1.70 3.6601 3.4416 3.2332 -1.82 1.74...
  • Page 29 Functions and control Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 1.1880 1.0789 0.9789 -3.53 3.24 1.1546 1.0476 0.9497 -3.58 3.28 1.1223 1.0174 0.9215 -3.64 3.33 1.0910 0.9882 0.8942 -3.69 3.37 1.0607 0.9599 0.8679 -3.74 3.42 1.0314 0.9326 0.8424 -3.80 3.46...

  • Page 30: System Configuration

    System configuration 8 System configuration 8.1System configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling(or heating) well, and to know a clever method of using it.

  • Page 31: Dimensional Drawings

    9.Dimensional 10.Center of gravity...

  • Page 32: Service Diagnosis

    Seivice diagnosis 11 Service Diagnosis 11.1 Caution for Diagnosis The operation lamp flashes when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation. 2.
  • Page 33 Seivice diagnosis 11.4Codes and Description 11.4.1.Problem Symptoms and Measures Symptom Check Item Details of Measure Check to make sure that the rated voltage is Check the power supply. None of the units supplied. operates Check the indoor PCB Check to make sure that the indoor PCB is broken Equipment operates but does Diagnosis...
  • Page 34 Seivice diagnosis Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred. Check the connector connection. Correct the connection Is it normal? Thermistor resistance check Replace the thermistor Is it normal? Replace the indoor unit PCB Thermistor resistance check method:...
  • Page 35 Seivice diagnosis 11.4.2.3 Indoor AC fan motor malfunction Indoor Display Method of Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction Malfunction abnormal fan motor operation Detection Detection Malfunction When the detected rotation feedback si g nal don’t received in 2 minutes Malfunction Decision Detection...

  • Page 36: Remove Procedure

    12 Remove Procedure Indoor unit...

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Hsu-18lpa03/r2P series

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