Friedrich Breeze Select Service Manual
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Friedrich Breeze Select Service Manual

Friedrich Breeze Select Service Manual

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Friedrich Breeze™ Select
Universal Heat Pumps
R-454B Refrigerant
Matched ODU to AHU Set
Breeze
Outdoor Unit
Indoor Unit
96112002_00
1
Select
TM
208/230 VOLT
WFPU17Y243D (24K), WFPU17Y363D(36K),
WFPU17Y483D (48K) , WFPU17Y603D (60K)
WFH24Y193D (24K), WFH36Y193D (36K),
WFH48Y223D (48K), WFH60Y223D (60K)
THE EXPERTS IN ROOM AIR CONDITIONING

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Nhoc Semus
June 12, 2025

what is the"air velocity" of the WFPU17Y243D Breeze inverter Heatpump condenser 17 seer2,24BTU,208-230V,R454B

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Summary of Contents for Friedrich Breeze Select

  • Page 1 Friedrich Breeze™ Select Universal Heat Pumps R-454B Refrigerant Matched ODU to AHU Set Breeze Select 208/230 VOLT Outdoor Unit WFPU17Y243D (24K), WFPU17Y363D(36K), WFPU17Y483D (48K) , WFPU17Y603D (60K) Indoor Unit WFH24Y193D (24K), WFH36Y193D (36K), WFH48Y223D (48K), WFH60Y223D (60K) THE EXPERTS IN ROOM AIR CONDITIONING...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION Important Safety Information Personal Injury Or Death Hazards Model Identification Guide Serial Number Reference Guide SPECIFICATIONS 24k-36k BTU 48-60k BTU Sound Pressure Data Blower Data - Indoor Unit Electrical Data - Outdoor Unit Outdoor Unit Clearances Dimensions Indoor Unit 24-36k (WFH24Y193D, WFH36Y193D) 48k-60k AHU (WFH48Y223D,WFH60Y223D)
  • Page 3 TABLE OF CONTENTS WIRING DIAGRAMS Indoor Unit 24k-36k BTU Outdoor Unit 48k-60k BTU Outdoor Unit Matched Set Auxiliary Heater Kits APPENDIX Interactive Parts Viewer Limited Warranty Thermistor Resistance Values Friedrich Authorized Parts Depots...

  • Page 4: Introduction

    Installation procedures are not given in this manual. They are given in the Installation/Operation manual which can be acquired on the Friedrich website. Click the Link or scan the QR code to be directed to the Professional page where you can locate our technical literature.

  • Page 5: Personal Injury Or Death Hazards

    INTRODUCTION Personal Injury Or Death Hazards WARNING AVERTISSEMENT ADVERTENCIA SAFETY Do not remove, disable Ne pas supprime, désacti- No eliminar, desactivar o or bypass this unit’s ver ou contourner cette pasar por alto los dispositi- FIRST safety devices. Doing so l´unité...

  • Page 6: Mechanical Hazards

    INTRODUCTION PERSONAL INJURY OR DEATH HAZARDS • REFRIGERATION SYSTEM REPAIR HAZARDS: • Use approved standard refrigerant recovering procedures and equipment to relieve high pressure before opening system for repair. Reference EPA regulations (40 CFR Part 82, Subpart F ) Section 608. •...
  • Page 7 CAUTION: Do Not Operate Equipment During Active Stages Of Construction To ensure proper operation, Friedrich requires that all equipment is not operated during active construction phases. This includes active stages of completing framing, drywalling, spackling, sanding, painting, flooring, and moulding in the equipment’s designated conditioning space. The use of this equipment during construction could result in premature failure of the components and/or system and is in violation of our standard warranty guidelines.

  • Page 8: Model Identification Guide

    FIRST UNIT OF EACH MONTH = 00001 27 = 2027 28 = 2028 MONTH OF MANUFACTURE 01 = JANUARY FACTORY DESIGNATION 02 = FEBRUARY M = FRIEDRICH MTY 03 = MARCH 04 = APRIL 05 = MAY 06 = JUNE 07 = JULY...

  • Page 9: Specifications

    SPECIFICATIONS 24k-36k BTU INDOOR MODEL NUMBER WFH24Y193D WFH36Y193D OUTDOOR MODEL NUMBER WFPU17Y243D WFPU17Y363D Power Supply V/Ph/Hz 208~230/1/60 208~230/1/60 Energy Star Standard(Current) Energy Star -Cold Climate A2l Sensor Cooling Rated Capacity At 95 ˚F Btu/H 24000 35000 Cooling Capacity Range(Min-Max) Btu/H 6000~24600 11000~36500 Cooling Capacity Range(Min-Max)
  • Page 10 SPECIFICATIONS 24k-36k BTU INDOOR MODEL NUMBER WFH24Y193D WFH36Y193D OUTDOOR MODEL NUMBER WFPU17Y243D WFPU17Y363D Indoor Airflow Rated M3/H 1360 1905 1120 Min-Max M3/H 902-1360 1334-1905 530-800 785-1120 Ultra Low Speed M3/H 1334 Rated In.w.c.(Pa) 0.58 (145) 0.58 (145) Range In.w.c.(Pa) 0-0.8 (0-200) 0-0.8 (0-200) Indoor Noise Level (Hi) Db(A)
  • Page 11 SPECIFICATIONS 24k-36k BTU INDOOR MODEL NUMBER WFH24Y193D WFH36Y193D OUTDOOR MODEL NUMBER WFPU17Y243D WFPU17Y363D Outdoor Coil Number Of Rows Tube Pitch(A) Row Pitch(B) 21.7 21.7 0.852 Fin Spacing Fins Per In Fin Type 895×630×43.3 975×714×43.3 Tube Outside Diameter And Type 35.2×24.8×1.7 38-3/8×28-1/8×1-3/4 Coil Dimension (WxHxD) Hydrophilic Aluminium...
  • Page 12 SPECIFICATIONS 24k-36k BTU INDOOR MODEL NUMBER WFH24Y193D WFH36Y193D OUTDOOR MODEL NUMBER WFPU17Y243D WFPU17Y363D Outdoor Unit Dimension (WxHxD) Inches 1/8ths 33-7/8 ×26-3/8 ×12-1/4 35-3/8×29-1/2×13-3/8 860×670×310 900×750×340 Packing(LxWxH) Inches 1/8ths 39×28-3/4 ×17-3/4 41×32-5/8×18-1/8 990×730×450 1040×830×460 Net Weight 104.5 116.8 Shipping Weight 112.2 125.7 50.5 Loading...

  • Page 13: 48-60K Btu

    SPECIFICATIONS 48-60k BTU Indoor Model WFH48Y223D WFH60Y223D Outdoor Model WFPU17Y483D WFPU17Y603D Power Supply V/ph/Hz 208~230/1/60 208~230/1/60 Energy Star Standard(Current) Energy Star -Cold Climate A2L Sensor Cooling Rated Capacity at 95 Btu/h 48000 54000 Cooling Capacity Range(MIN-MAX) Btu/h 14000~48600 14000~54000 Cooling Capacity Range(MIN-MAX) 4100~14200 4100~15800 Capacity at 115˚F...

  • Page 14: Specification

    SPECIFICATION 24k-36k BTU Indoor Model WFH48Y223D WFH60Y223D Outdoor Model WFPU17Y483D WFPU17Y603D Indoor AirFlow Rated m3/h 2900 2900 1706 1706 Min-Max m3/h 1967-2900 1967-2900 1157-1706 1157-1706 Ultra low speed m3/h 1967 1967 1157 1157 Rated In.W.C.(Pa) 0.58 (145) 0.58 (145) Range In.W.C.(Pa) 0-0.8 (0-200) 0-0.8 (0-200)
  • Page 15 SPECIFICATION 24k-36k BTU Indoor Model WFH48Y223D WFH60Y223D Outdoor Model WFPU17Y483D WFPU17Y603D Outdoor Coil Number of Rows Tube Pitch(a) Row Pitch(b) 21.7 21.7 Fin Spacing Fins Per in Fin Type 1190×840×43.3 1190×840×43.3 Tube Outside Diameter and Type 46-7/8×33-1/8×1-3/4 46-7/8×33-1/8×1-3/4 Coil Dimension(WxHxD) Hydrophilic aluminium Hydrophilic alu- minium...
  • Page 16 SPECIFICATION 24k-36k BTU Indoor Model WFH48Y223D WFH60Y223D Outdoor Model WFPU17Y483D WFPU17Y603D Outdoor Unit Dimension (WxHxD) inches 1/8ths 43-1/4×34-1/2×17-3/4 43-1/4×34-1/2×17-3/4 1100×875×450 1100×875×450 Packing(LxWxH) inches 1/8ths 45-7/8×39-1/2×21-1/4 45-7/8×39-1/2×21-1/4 1165×1005×540 1165×1005×540 Net Weight 186.7 186.7 Shipping Weight 210.9 210.9 Loading Outdoor Unit Loading Capacity (20GP/40GP/40’HQ) 40/88/88 40/88/88 Indoor Unit Loading Capacity (20GP/40GP/40’HQ)
  • Page 17 SPECIFICATIONS Electric Heater kits Breeze AHU Electric Heat Kits Heating kW Correction Factor Supply Voltage Correction Factor Standard Features Controlled by Relays or Contactors Plug-in wiring harness for ease on installation into air handler UL certified Electrical Data Air Handlers Circuit #1 Circuit #2 Coil QTY...

  • Page 18: Sound Pressure Data

    SPECIFICATIONS 5. Sound pressure data Sound Pressure Data Outdoor unit Model Model 3.28ft(1.0m) in front of the unit; 2.7ft (0.83) 3.28ft. (1.0m) in front of the unit; 3.28ft. Test condition high from the bottom of the unit; 3.28ft Test condition (1.0m) above the bottom of the unit.
  • Page 19 5. SOUND PRESSURE DATA SPECIFICATIONS 5. Sound Pressure Data Sound Pressure Data Indoor Unit Model Model 3.28ft. (1.0m) in front of the outlet of the 3.28ft. (1.0m) in front of the outlet of the Test Condition Test Condition wind tunnel; 3.28ft. (1.0m) above the bottom wind tunnel;...

  • Page 20: Blower Data - Indoor Unit

    SPECIFICATIONS 4. Blower Data Blower Data - Indoor Unit Airflow performance data is based on cooling performance with a coil and no filter in place. Check the performance table for appropriate unit size selection. External static pressure should stay within the minimum and maximum limits shown in the table below in order to ensure proper cooling, heating , and electric heating operation.

  • Page 21: Electrical Data - Outdoor Unit

    3.ELECTRICAL DATA SPECIFICATIONS 3. Electrical data Electrical Data - Outdoor Unit Power supply Applicable voltage Indoor Unit Nominal Frequency Nominal Voltage (V) Umin (V) Umax (V) Sensitive (Hz) Current (A) Current (mA) 208/230 3 6 K 208/230 48K/60K 208/230 NOTE: 1.

  • Page 22: Outdoor Unit Clearances

    SPECIFICATIONS Outdoor Unit Clearances 24K/36K/48K/60K: Over 24 in. (600mm) Figure 206 (Outdoor Unit Clearances)

  • Page 23: Outlines And Dimensions

    2. OUTLINES AND DIMENSIONS SPECIFICATIONS 2. Outlines and Dimensions Dimensions Indoor Unit 24-36k (WFH24Y193D, WFH36Y193D) 24K/36K U U n n i i t t : : i i n n . . ( ( m m m m ) ) Figure 207 (24k-36k BTU Indoor Unit Dimensions)

  • Page 24: 48K-60K Ahu (Wfh48Y223D,Wfh60Y223D)

    SPECIFICATIONS 2. OUTLINES AND DIMENSIONS Dimensions Indoor Unit 48k-60k AHU (WFH48Y223D,WFH60Y223D) 48K/60K U U n n i i t t : : i i n n . . ( ( m m m m ) ) 24(610) Figure 208 (48k-60k BTU Indoor Unit Dimensions)

  • Page 25: Dimensions Outdoor Unit

    SPECIFICATIONS Dimensions Outdoor Unit WFPU17Y243D (24K BTU) Unit : in.(mm) Electric box 12-1/4(312) Liquid pipe 6-5/8(168) 3(76) 21-3/8(542) Gas pipe 33-7/8(860) Air inlet Drain pipe 4-11×17 Hole Air outlet Figure 209 (24k Outdoor Unit Dimensions)

  • Page 26: Wfpu17Y363D (36K (Btu)

    SPECIFICATIONS Dimensions Outdoor Unit WFPU17Y363D (36k (BTU) Unit : in.(mm) Electric box 13-1/2(344) Liquid pipe Gas pipe 23-15/16(608) 5-3/4(146) 3(76) 4-7/8(123) 35-3/8(900) 4-15/16(125) Drain pipe 4-3/8(10)*3/4(20) Hole Air inlet 14-1/8(359) Air outlet Figure 210 (36k Outdoor Unit Dimensions)

  • Page 27: Wfpu17Y483D (48K (Btu), Wfpu17Y603D (60K (Btu)

    SPECIFICATIONS Dimensions Outdoor Unit WFPU17Y483D (48k (BTU), WFPU17Y603D (60k (BTU) Unit: in.(mm) Electric box 7/8(23) 1-3/8(35) 1-1/8(30) 9-1/4(235) 16(408) 43-3/8(1100) 8-7/8(225) 25-1/4(640) Drain pipe Air inlet 18-1/2(471) 2-1/2(12)×3/4(20) 2-3/4(70) Air outlet Figure 211 (48-60k BTU Outdoor Unit Dimensions)

  • Page 28: Capacities And Selection Data - Capacity Characteristics Charts

    4. Capacities and selection data SPECIFICATIONS 4.1 Capacity characteristic charts The following charts show the characteristics of outdoor unit capacity, which corresponds with the Capacities and Selection Data - Capacity Characteristics Charts operating ambient temperature of outdoor unit. Conditions: · Pipe length / height di ff erence: 25 ft. (7.6m) / 0 ft. (0m) ·...
  • Page 29 SPECIFICATIONS Capacities and Selection Data - Capacity Characteristics Charts Performance data (Cooling operation at rated frequency) 24K outdoor unit matches 24K indoor unit IWB (°F) Airflow Outdoor IDB (°F) （CMF） 18.6 18.8 19.2 19.4 19.2 19.4 19.6 19.8 20.5 20.7 20.9 21.0 25.0 25.2 25.4 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67...
  • Page 30 SPECIFICATIONS Capacities and Selection Data - Capacity Characteristics Charts IWB (°F) Airflow Outdoor （CMF） IDB (°F) 21.3 21.5 22.0 22.2 22.0 22.2 22.5 22.7 23.5 23.7 23.9 24.1 28.2 28.4 28.8 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67 1.48 1.49 1.50 1.50 1.50 1.52 1.54 1.55 1.55 1.57 1.59 1.60 1.87 1.89 1.79...
  • Page 31 SPECIFICATIONS Capacities and Selection Data - Capacity Characteristics Charts Performance data (Cooling operation at rated frequency) 36K outdoor unit matches 36K indoor unit IWB (°F) Airflow Outdoor IDB (°F) （CMF） 27.1 27.4 28.0 28.3 28.0 28.3 28.6 28.9 29.9 30.2 30.5 30.6 36.5 36.7 37.0 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67...
  • Page 32 SPECIFICATIONS Capacities and Selection Data - Capacity Characteristics Charts IWB (°F) Airflow Outdoor （CMF） IDB (°F) 31.0 31.4 32.0 32.4 32.0 32.4 32.8 33.1 34.3 34.6 34.8 35.1 41.1 41.4 42.0 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67 2.19 2.22 2.24 2.24 2.24 2.27 2.29 2.31 2.31 2.33 2.36 2.38 2.79 2.81 2.66...
  • Page 33 SPECIFICATIONS Capacities and Selection Data - Capacity Characteristics Charts Performance data (Cooling operation at rated frequency) 48K outdoor unit matches 48K indoor unit IWB (°F) Airflow Outdoor （CMF） IDB (°F) 37.2 37.6 38.4 38.9 38.4 38.9 39.2 39.6 41.0 41.4 41.8 42.0 50.0 50.4 50.8 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67...
  • Page 34 SPECIFICATIONS Capacities and Selection Data - Capacity Characteristics Charts IWB (°F) Airflow Outdoor （CMF） IDB (°F) 42.5 43.0 43.9 44.4 43.9 44.4 44.9 45.5 47.1 47.5 47.7 48.1 56.3 56.7 57.6 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67 2.95 2.98 3.01 3.01 3.01 3.05 3.08 3.10 3.10 3.13 3.17 3.20 3.75 3.78 3.58...
  • Page 35 SPECIFICATIONS Capacities and Selection Data - Capacity Characteristics Charts Performance data (Cooling operation at rated frequency) 60K outdoor unit matches 60K indoor unit IWB (°F) Airflow Outdoor （CMF） IDB (°F) 41.9 42.3 43.2 43.7 43.2 43.7 44.2 44.6 46.1 46.6 47.0 47.3 56.3 56.7 57.1 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67...
  • Page 36 SPECIFICATIONS Capacities and Selection Data - Capacity Characteristics Charts IWB (°F) Airflow Outdoor （CMF） IDB (°F) 47.9 48.4 49.4 50.0 49.4 50.0 50.6 51.1 53.0 53.4 53.7 54.1 63.4 63.8 64.8 0.99 1.00 1.00 1.00 0.61 0.83 1.00 1.00 0.39 0.57 0.73 0.90 0.39 0.53 0.67 3.77 3.81 3.85 3.85 3.85 3.90 3.94 3.97 3.97 4.01 4.06 4.10 4.79 4.83 4.58...

  • Page 37: Capacities And Selection Data - Piping Length Correction Factor

    SPECIFICATIONS 4.2 Piping length correction factor Capacities And Selection Data - Piping Length Correction Factor The correction factor is based on the equivalent piping length in meters (EL) and the height difference between outdoor and indoor units in meters (H). Height difference between indoor unit and outdoor unit (m).

  • Page 38: Capacities And Selection Data - Correction Factor To Include Defrosting Operation

    SPECIFICATIONS 4 4 . . 3 3 C C o o r r r r e e c c t t i i o o n n f f a a c c t t o o r r s s a a c c c c o o r r d d i i n n g g t t o o d d e e f f r r o o s s t t i i n n g g o o p p e e r r a a t t i i o o n n Capacities And Selection Data - Correction Factor to Include Defrosting Operation The heating capacity in the previous part, excludes the condition of defrosting operation period.

  • Page 39: Electrical Data - Indoor Unit

    3. ELECTRICAL DATA SPECIFICATIONS 3. Electrical Data Electrical Data - Indoor Unit Power Supply Applicable Voltage Indoor Unit Nominal Frequency Nominal Voltage (V) Sensitive Umin. (V) Umax. (V) Current (A) (Hz) Current (mA) 24K/36K/ 208/230 48K/60K NOTE: 1. The above compressor data is based on 100% capacity combination of indoor units at the rated operating frequency. 2.

  • Page 40: Operation

    OPERATION Control Mode - Outdoor Unit Control function 1. Cooling Anti-Freeze Protection The outdoor pressure sensor functions as real time temperature detector of the evaporator. It prevents the indoor unit evaporator temperature from becoming too low. If the indoor coil temperature is too low, the compressor will automatically start protection mode. 2.

  • Page 41: System Logic

    OPERATION Control Mode - Outdoor Unit 9.4 Evaporator Low-temperature Protection DC Inverter AC will enter T2 protection if any of the following condition is satisfied. Condition: Cooling mode: When the saturation temperature (which is got from low pressure cycling) T2 stays lower than TE5 for 10 seconds, the compressor and outdoor fan will shut off.
  • Page 42 OPERATION System Logic Electric Heating - The W terminal on the outdoor unit must be connected to the W1 terminal on the indoor unit. The outdoor unit will provide 24v to indoor unit as a signal when defrost conditions are met. The indoor unit will energize the electric heater to operate. If the heater (larger kW kits) has two coils, then only the larger of the two coils will be energized during defrost heating.

  • Page 43: Odu Refrigerant Schematic 24K-36K

    K/36K OPERATION ODU Refrigerant Schematic 24k-36k Cooling cycle Heating cycle 1 1 3 3 1 1 4 4 List of components Compressor Strainer Discharge temperature sensor One-way valve Stop valve (Gas) 4-Way valve Outdoor heat exchanger Electronic expansion valve Coil temperature sensor Stop valve (Liquid) Pressure sensor Ambient temperature sensor...

  • Page 44: Odu Refrigerant Schematic 48K-60K

    OPERATION ODU Refrigerant Schematic 48k-60k 1 1 7 7 1 1 6 6 1 1 5 5 List of components Compressor Coil temperature sensor Discharge temperature sensor Strainer High pressure switch One-way valve Low pressure switch Electronic expansion valve Gas-liquid separator Stop valve (Liquid) Pressure sensor Stop valve (Gas)

  • Page 45: Refrigerant Cycle

    6. Refrigerant Cycle OPERATION Indoor Unit AHU Refrigerant Schematic 24k-60k Cooling Cycle 24K/36K/48K/60K Heating Cycle List of Components Hexagon Nut Indoor Heat Exchanger...

  • Page 46: Field Settings

    8. Field setting OPERATION 8.1 Outdoor unit DIP switch Field Settings DIP Switch Setting of Outdoor Unit (Optional setting) 1. Turn on the power before setting the S4-2/S4-3 DIP switches, and dial the switches from OFF to ON. Without turning on, the switches settings are not refreshed and might be invalid. 2.

  • Page 47: Field Setting

    OPERATION 8.FIELD SETTING Field Settings Step 3: Turn on the power. Step 4: Switch S4-2 to ON position on the checker board, the outdoor unit starts, and the current frequency value is displayed on the 7 segment display. Step 5: The frequency value will keep changing until "CLOS"...
  • Page 48 OPERATION 8.FIELD SETTING Field Settings 8.2 Running parameter query Query by 7 segment display 7 segment display Switch 7 segment display Introduction ● ● ● Decrease Select Increase There are 3 buttons on the 7 segment board. 1) Select button: Select to display outdoor/indoor unit parameter. "P."...
  • Page 49 8.FIELD SETTING OPERATION Field Settings P P a a r r a a m m e e t t e e r r s s c c a a n n b b e e c c h h e e c c k k e e d d i i n n t t h h e e f f o o l l l l o o w w i i n n g g t t a a b b l l e e b b e e l l o o w w . . P P a a r r a a m m e e t t e e r r D D e e s s c c r r i i p p t t i i o o n n s s c c o o d d e e...

  • Page 50: Troubleshooting

    TROUBLESHOOTING Normal Malfunction Troubleshooting Possible Reasons of Abnormality How to Deal With 1. Check power supply circuit; 1. Power supply failure; 2. Measure insulation resistance to 2. Circuit breaker tripped or fuse blown. ground to see if there is any leakage; Air conditioner will not start up 3.

  • Page 51: Outdoor Unit Fault Codes

    13. TROUBLESHOOTING TROUBLESHOOTING Outdoor Unit Fault Codes Outdoor unit DC-Inverter unitary (Main control board upside-down) 1) Fault code displayed by LED lamps on outdoor main control board. There are 3 LED lamps on control board, LED1, LED2 and LED3. LED1 indicates the ten's place of the fault code, LED2 indicates the unit's place of the fault code and LED3 indicates outdoor drive control fault.
  • Page 52 TROUBLESHOOTING 13. TROUBLESHOOTING Outdoor Unit Fault Codes 2 2 ) ) D D i i s s p p l l a a y y b b y y 7 7 s s e e g g m m e e n n t t d d i i s s p p l l a a y y b b o o a a r r d d . . Fault code will be displayed directly on 7 segment display board.

  • Page 53: Diagnostic Codes - Outdoor Unit

    TROUBLESHOOTING Diagnostic Codes - Outdoor Unit Fault Possible reasons for Fault description How to deal with Remarks code abnormality 1. The outdoor ambient 1. Reconnect the outdoor ambient temperature sensor is connected temperature sensor; Outdoor ambient loosely; 2. Replace the outdoor ambient temperature sensor fault 2.
  • Page 54 TROUBLESHOOTING Diagnostic Codes - Outdoor Unit Fault Possible reasons for Fault description How to deal with Remarks code abnormality 1. The wiring of the high 1. Reconnect the wiring of the pressure switch is connected high pressure protector; loosely; 2. Replace the high pressure The high pressure switch 2.
  • Page 55 TROUBLESHOOTING Diagnostic Codes - Outdoor Unit Fault Possible reasons for Fault description How to deal with Remarks code abnormality 1. Refrigerant is low. 1. Check the welding point to 2. The refrigerant is low due confirm whether the unit has to the length of the installation leakage point, and then add pipe and failure to make proper...
  • Page 56 TROUBLESHOOTING Diagnostic Codes - Outdoor Unit Overload in cooling mode The root cause Corrective measure Discharge the refrigerant, and recharge The refrigerant is excessive. the refrigerant referring to the rating label. The outdoor ambient temperature is too high. Please use it within allowable temperature range Short-circuit occurs in the air outlet and air inlet of Adjust the installation of the outdoor unit the outdoor unit.

  • Page 57: Diagnostic Codes -Drive Faults

    TROUBLESHOOTING Diagnostic Codes -Drive Faults Fault Fault description Possible reasons for abnormality How to deal with code Inverter DC voltage overload fault 1. Power supply input is too high or too low; 1. Check power supply Inverter DC low voltage fault 2.

  • Page 58: Protection Circuit Fault Isolation

    TROUBLESHOOTING Protection Circuit Fault Isolation Protection diagnosis of the complete machine (all types of protection during operation, i.e. under-voltage, over-voltage and over-current protection) Note:List all types of protection that may occur to the complete machine and describe the conditions and signs of the start, course and end of such protection.

  • Page 59: Checking Components

    14. Checking components TROUBLESHOOTING 14.1 Check refrigerant system Check Refrigeration System TEST SYSTEM FLOW: Conditions: Compressor is running. The air condition should be installed in good ventilation. Tool: Pressure Gauge Technique: ① see ② feel ③ test See ----- Tube defrost. Feel ----- The difference between tube’s temperature.
  • Page 60 14.CHECKING COMPONENTS TROUBLESHOOTING Check Refrigeration System Heating mode Test system pressure. Is the high The pressure on the pressure normal at high side. service part ? Recharge refrigerant Remove the back after air purging with The pressure on the panel."see" the the vacuum low side.

  • Page 61: Components Testing

    COMPONENTS TESTING Compressor OVERLOAD PROT ECTION INVERTER POWER & CONTROLLER Resistance Test. The compressor is at fault if the resistance of winding is 0(short circuit)or∞ open circuit. Common signs compressor is faulty: • Compressor motor lock. • Discharge pressure value approaches static pressure value . •...

  • Page 62: Eev Stepper Coil

    COMPONENTS TESTING EEV Stepper Coil Discharge pipe temperature is too high. This means the compressor is over heating and will shut down and lock itself out. The cause for this issue is lack of refrigerant coming back to the compressor to cool the compressor. The main causes of this would be low charge, restriction or issue with the electronic expansion valve (EEV).

  • Page 63: Indoor Fan Motor

    COMPONENTS TESTING Indoor Fan Motor Indoor Unit Fan Motor Duct motor model WARNING 24K: ZWK702B006073 36K: ZWK702B500026 48K: ZKSD-560-8-50-14 ELECTRIC SHOCK HAZARD 60K: ZKSD-560-8-58 Turn off electric power before service or installation. Extreme care must be used, if it Check Power for Motor becomes necessary to work on equipment with Check L1 and L2 for 230 VAC power applied.

  • Page 64: Outdoor Fan Motor

    COMPONENTS TESTING Outdoor Fan Motor Resistance Test. WARNING 1. Disconnect the outdoor fan motor plug on the main PCB. ELECTRIC SHOCK HAZARD U= Yellow V= Red W= White Turn off electric power before service or installation. Extreme care must be used, if it 3.

  • Page 65: Component Testing

    COMPONENT TESTING Reversing Valve A reversing valve is a component of a heat pump that changes the direction of WARNING refrigerant flow, allowing the system to function in both heating and cooling modes. It consists of a pressure-operated, main valve and a pilot valve actuated by a ELECTRIC SHOCK HAZARD solenoid plunger.

  • Page 66: Indoor Unit Main Pcb

    7.2 Control Board Picture COMPONENTS TESTING Indoor Unit Main PCB Description Description otor for T TO-outdoor control Fuse -φ5.2mm×20mm, 5A, 250V...

  • Page 67: Outdoor Unit Main Pcb (24K-36K Btu)

    COMPONENTS TESTING 24K/36K Main control board Outdoor Unit Main PCB (24k-36k BTU) 1 2 3 4 5 6 7 8 9 Description Description Crankcase Heater High Pressure Switch 4-way Valve Overheat Protector Base Heater Press Sensor Coil Temperature Sensor Communication Signal between IDU&ODU AC Power Lin / AC Power Nin Program Discharge Temperature Sensor...

  • Page 68: Wiring Diagram

    COMPONENTS TESTING 7.WIRING DIAGRAM Outdoor Unit Main PCB (48k-60k BTU) 48K/60K Main control board 18 17 16151413 12 11 Description Description AC Power Input L/N Pressure Sensor Electric Heating Belt Coil Temperature Sensor Ambient Temperature Sensor Base Heater Discharge Temperature Sensor 4-way Valve 24V Communication Signal-W Overheat Protection Switch...

  • Page 69: Outdoor Unit Main Filter Pcb (48K-60K Btu)

    Filter board COMPONENTS TESTING Outdoor Unit Main Filter PCB (48k-60k BTU) Description Description N Out Relay Control Signal L Out...

  • Page 70: Outdoor Unit Display Pcb (48K-60K Btu) (Checker Board)

    7.WIRING DIAGRAM COMPONENTS TESTING Outdoor Unit Display PCB (48k-60k BTU) (Checker Board) 7 Segment display board (Checker board) Description Description Computer/Checker to Outdoor Control Board S1-Select Button 7-Segment Display S2-Increase Button DIP Switch S3-Decrease Button...

  • Page 71: R-454B Sealed System Repair

    R-454B SEALED SYSTEM REPAIR General Information WARNING: Electrical Shock Hazard Disconnect all power to the unit before starting maintenance. All electrical connections and wiring MUST be installed by a qualified electrician and conform to all codes which have jurisdiction. Failure to do so can result in property damage, severe electrical shock or death.
  • Page 72 R-454B SEALED SYSTEM REPAIR General Information Warning: No ignition sources: No person carrying out work in relation to a REFRIGERATING SYSTEM which involves exposing any pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which refrigerant can possibly be released to the surrounding space.

  • Page 73: Required Equipment

    R-454B SEALED SYSTEM REPAIR Required Equipment Pipe tubing cutter. • Refrigerant recovery cylinder. (Flammable A2L label) • • Ventilation fan. • Class ABC fire extinguisher. • Process Tube adapter kit • Recovery access tool. • Purge hose fittings • Pinch off and opening tools ABC Fire Extinguisher Recovery Machine Vaccum Pump...

  • Page 74: Refrigerant Removal, Recovery, And Evacuation

    R-454B SEALED SYSTEM REPAIR Refrigerant Removal, Recovery, and Evacuation NOTE: When accessing the refrigerant in the system to make repairs or for any other purpose, conventional procedures shall be used. However, for FLAMMABLE REFRIGERANTS (R-454B is classified in the A2L group for mildly flammable refrigerants) it is important that best practice is followed since flammability is a consideration.

  • Page 75: Component Replacement/Brazing

    R-454B SEALED SYSTEM REPAIR Component Replacement/Brazing Warning: • Ensure sufficient ventilation at the repair place. Warning: Presence of fire extinguisher. If any hot work is to be conducted on the refrigerating equipment or any associated parts, have a ABC class fire extinguisher available to hand.

  • Page 76: Triple Evacuation

    Triple Evacuation Friedrich requires all installations are Leak Checked and Evacuated in accordance to the “triple evacuation” process. This process promotes a dry tight refrigeration system before opening the service valves. It recommended that a single port refrigeration manifold and hoses rated over 31.5 psi be used.

  • Page 77: Refrigerant Charging

    R-454B SEALED SYSTEM REPAIRS Refrigerant Charging WARNING: Electrical Shock Hazard Disconnect all power to the unit before starting maintenance. All electrical connections and wiring MUST be installed by a qualified electrician and conform to all codes which have jurisdiction. Failure to do so can result in property damage, severe electrical shock or death. WARNING: This Product uses R-32 Refrigerant Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.

  • Page 78: Refrigerant Charging-Piping Work

    9. PIPING WORK AND REFRIGERANT CHARGE R-454B SEALED SYSTEM REPAIRS Refrigerant Charging-Piping Work Piping work and refrigerant charge MAX. length allowed Indoor Outdoor unit unit Max. length Max. length Gas Pipe Gas Pipe Outdoor Indoor Liquid Pipe unit unit Liquid Pipe Returned oil elbow Add.

  • Page 79: Adjust Refrigerant Level

    9. PIPING WORK AND REFRIGERANT CHARGE R-454B SEALED SYSTEM REPAIRS A A d d j j u u s s t t R R e e f f r r i i g g e e r r a a n n t t L L e e v v e e l l Adjust Refrigerant Level Using service equipment, add or recover refrigerant according to the refrigerant calculation.

  • Page 80: Compressor Replacement 24-36K

    R-454B SEALED SYSTEM REPAIRS Compressor Replacement 24-36k 5. Remove the compressor mounting bolts. WARNING 6. After all refrigerant has been recovered, cut and remove compressor. Be certain to have both suction and discharge process tubes open to ELECTRIC SHOCK HAZARD atmosphere.

  • Page 81: Compressor Replacement 48-60K

    R-454B SEALED SYSTEM REPAIRS Compressor Replacement 48-60k 5. Remove the compressor mounting bolts. WARNING 6. After all refrigerant has been recovered, cut and remove compressor. Be certain to have both suction and discharge process tubes open to ELECTRIC SHOCK HAZARD atmosphere.

  • Page 82: Replace The Reversing Valve

    R-454B SEALED SYSTEM REPAIR Replace The Reversing Valve WARNING WARNING HIGH PRESSURE HAZARD EXPLOSION HAZARD Sealed Refrigeration System contains refrigerant The use of nitrogen requires a pressure and oil under high pressure. regulator. Follow all safety procedures and wear protective safety clothing etc. Proper safety procedures must be followed, and PPE must be utilized Failure to follow proper safety procedures...

  • Page 83: Wiring Diagrams

    WIRING DIAGRAMS Indoor Unit NOTES: ℃ EHK is optional . If EHK needs to be installed, please see Wiring Diagram of EHK for wiring details. When the refrigerant leakage sensor detects that its concentration reaches the alarm threshold, the AHU Control Board will force the indoor Blower into a High Speed Condition and remove 24v from Y2 OUT/Y1-OUT/G-OUT to thethe outdoor unit stopping its compressor and fan.

  • Page 84: 24K-36K Btu Outdoor Unit

    WIRING DIAGRAMS 24k-36k BTU Outdoor Unit WFPU17Y243D, WFPU17Y363D USE COPPER SUPPLY WIRES COMPUTER L-IN(X100) Checker (X560) N-IN (X110) EARTH (X120) Electronic Expansion X3.6 Valve X3.4 X3.3 X3.2 X3.1 Y/Y2 HEAT-PRO (X430) 4-WAY Four Way Valve (X800) HEAT (X815) DC FAN (X860) L1(X701) L2(X702)

  • Page 85: 48K-60K Btu Outdoor Unit

    WIRING DIAGRAMS 48k-60k BTU Outdoor Unit WFPU17Y483D, WFPU17Y603D Electric wiring diagram 2341748.F Figure 805...

  • Page 86: Matched Set

    WIRING DIAGRAMS Matched Set Y/Y2 L1 L2 Power C G O Y1 Y2 L1 L2 Thermostat G W1 R W2 Y2-TH Y2-OUT Y1-OUT G-OUT Y1-TH terminal panel Power supply X 12 Indoor unit Outdoor unit L1 L2 PE Power supply Power supply AUX HEAT KIT EXPLANATION OF TERMINALS...

  • Page 87: Auxiliary Heater Kits

    WIRING DIAGRAMS Auxiliary Heater kits AUX5KWA AUX7KWA AUX5KWA 167℉/ 167℉/ Must Must AUX10KWA AUX15KWA 167℉/ 167℉/ Must Must AUX20KWA 167℉/ Must...

  • Page 88: Appendix

    APPENDIX Interactive Parts Viewer All Friedrich Service Parts can be found on our online interactive parts viewer. Please click on the link below: Interactive Parts Viewer For Further Assistance contact Friedrich customer service at (1-800-541-6645). Limited Warranty Current warranty information can be obtained by referring to...

  • Page 89: Sensor Parameter

    12.SENSOR PARAMETER APPENDIX 12. Sensor parameter Thermistor Resistance Values 1. . The parameter of outdoor compressor discharge temperature sensor: (R0=187.25K±6.3%；R 100 =3.77K±2.5K；B0/100=3979K±1%) DR: Deviation Rate DR(MIN)%=（Rmin-Rnom）/Rnom*100% DR(MAX)%=（Rmax-Rnom）/Rnom*100% T [℉ ℉ ] T [℃ ℃ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ...

  • Page 90: Thermistor Resistance Values

    APPENDIX 12.SENSOR PARAMETER Thermistor Resistance Values T [℉ ℉ ] T [ ℃ ℃ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% 66.2 71.2227 75.3122 79.3848 -5.43 5.13 68.1036 71.9808 75.8414 -5.39 5.09 69.8 65.1373 68.8141...
  • Page 91 APPENDIX 12.SENSOR PARAMETER Thermistor Resistance Values T [℉ ℉ ] T [℃ ℃ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% 8.0951 8.3705 8.6440 -3.29 3.16 168.8 7.8290 8.0926 8.3544 -3.26 3.13 170.6 7.5730 7.8252 8.0758...
  • Page 92 APPENDIX 12.SENSOR PARAMETER Thermistor Resistance Values 2. THE PARAMETER OF THE OTHER SENSOR:(R =15K±2%;B0/100=3450K±2%) DR: Deviation Rate DR(MIN)%=（Rmin-Rnom）/Rnom*100% DR(MAX)%=（Rmax-Rnom）/Rnom*100% T [℉ ℉ ] T [℃ ℃ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% 60.78 64.77...
  • Page 93 APPENDIX 12.SENSOR PARAMETER Thermistor Resistance Values T [℃ ℃ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% DR(MAX)% T [℉ ℉ ] 5.667 5.882 6.103 73.4 -3.66 3.62 5.449 5.664 5.886 75.2 -3.80 3.77 5.240 5.456 5.678...
  • Page 94 12.SENSOR PARAMETER APPENDIX Thermistor Resistance Values T [℃ ℃ ] DR(MAX)% T [℉ ℉ ] Rmin [ KΩ ] Rnom [ KΩ ] Rmax [ KΩ ] DR(MIN)% 0.8570 0.9246 0.9971 174.2 -7.31 7.27 0.8316 0.8977 0.9687 -7.36 7.33 177.8 0.8071 0.8717 0.9412...

  • Page 95: Friedrich Authorized Parts Depots

    APPENDIX Friedrich Authorized Parts Depots United Products Distributors Inc. The Gabbert Company Reeve Air Conditioning, Inc. 4030A Benson Ave 2501 South Park Road 6868 Ardmore Hallandale, Florida 33009 Halethorpe, MD 21227 Houston, Texas 77054 888-907-9675 954-962-0252 c.businsky@updinc.com 713-747-4110 800-962-3383 800-458-4110 Shivani Refigeration &...

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