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Daikin SkyAir RZR-TA Series Service Manual
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Daikin SkyAir RZR-TA Series Service Manual

Cooling only 60 hz heat pump 60 hz
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SiUS281811E
Service
Manual
RZR-TA, RZQ-TA Series
Cooling Only 60 Hz
Heat Pump 60 Hz

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Summary of Contents for Daikin SkyAir RZR-TA Series

  • Page 1 SiUS281811E Service Manual RZR-TA, RZQ-TA Series Cooling Only 60 Hz Heat Pump 60 Hz...
  • Page 2 Introduction ..................1 Part 1 General Information ............... 9 Part 2 Refrigerant Circuit............... 41 Part 3 Remote Controller ..............51...
  • Page 3 Part 4 Functions and Control ............70 Part 5 Field Settings and Test Operation ........111...
  • Page 4 Part 6 Service Diagnosis ............... 161...
  • Page 6 Part 7 Appendix ................277...

  • Page 7: Introduction

    Introduction...

  • Page 15: Part 1 General Information

    Part 1 General Information...
  • Page 18 Shown with BYCQ125B-W1...

  • Page 47: Part 2 Refrigerant Circuit

    Part 2 Refrigerant Circuit...
  • Page 49 (11) (12) (10) (15) (14) (13) (17) (18)* S1NPH (16) S1NPL S1PH ∗ The radiation fin thermistor (18) is located near the electrical component box. C: 3D082498F...
  • Page 51 (16) (10) (13) (11) (14) (12) (18)* S1NPH (15) (17) pressure sensor S1PH S1NPL ∗ The radiation fin thermistor (18) is located near the electrical component box. C: 3D088595A...
  • Page 52 Gas piping Gas piping connection port connection port Indoor heat exchanger Indoor heat exchanger Liquid piping Liquid piping connection port connection port Filter Filter Filter Filter C: 4D034245R C: 4D024460P Gas piping connection port Indoor heat exchanger Liquid piping connection port Filter Filter C: 4D034245R...
  • Page 53 Top view Low pressure sensor (S1NPL) High pressure sensor (S1NPH) Thermistor (Suction pipe 2) (R5T) Front view Solenoid valve coil (Hot gas) (Y2S) Four way valve coil (Y1S) Solenoid valve coil (Unload circuit) (Y3S) Inverter fan (M1F) Thermistor (Discharge pipe) (R2T) High pressure switch (S1PH)
  • Page 54 Side view Four way valve (Y1S) Thermistor (Outdoor air) (R1T) Thermistor (Suction pipe 1) (R3T) Thermistor (Heat exchanger deicer) (R4T) C: 1P342997M...
  • Page 55 Front view Four way valve coil Inverter fan (M1F) Four way valve coil (Y1S) Thermistor (Suction pipe 2) (R5T) Thermistor (Discharge pipe) (R2T) Inverter fan Low pressure sensor (M2F) (S1NPL) High pressure sensor (S1NPH) High pressure switch (S1PH) Inverter compressor (M1C) Crankcase heater (E1HC) C: 1P441643G...
  • Page 56 Side view Thermistor (Subcooling heat exchanger gas pipe) (R6T) Thermistor (Suction pipe 1) (R3T) Thermistor (Outdoor air) (R1T) Electronic expansion valve/coil (Main) (Y1E) Electronic expansion valve/coil (Subcooling) (Y3E) Thermistor (Liquid pipe) (R7T) Thermistor (Heat exchanger deicer) (R4T) C: 1P441643G...

  • Page 57: Part 3 Remote Controller

    Part 3 Remote Controller...
  • Page 59 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10. Cancel button 2. Fan speed control button Functions other than basic operation items (i.e., On/Off, Operation Mode, Fan Speed, and Setpoint) are set from the menu screen.
  • Page 60 4. Up button Used to raise the setpoint. The item above the current selection will be highlighted. (The highlighted items will be scrolled continuously when the button is continuously pressed.) Used to change the selected item. 5. Down button Used to lower the setpoint. The item below the current selection will be highlighted.
  • Page 61 Service Check Function <Main Menu> Main Menu • Airflow Direction Airflow Direction • Individual Airflow Direction Individual Airflow Direction • Ventilation Ventilation • Schedule Schedule • Off Timer Off Timer • Celsius / Fahrenheit Celsius / Fahrenheit • Filter Auto Clean Setting •...
  • Page 62 BRC2A71 ON/OFF BUTTON DISPLAY “ ” (UNDER CENTRALIZED CONTROL) Press the button and the system will start. Press the button again and the system will stop. When this display shows, the system is UNDER CENTRALIZED CONTROL. OPERATION LAMP (RED) (This is not a standard specification) The lamp lights up during operation.
  • Page 63 ON OFF ON OFF TEMP TIME DOWN DOWN RESERVE CANCEL TIMER MODE SWING TEST TEST TEST Receiver 22 23 19 21 20 FBQ (separate type)
  • Page 64 PROGRAMMING TIMER BUTTON DISPLAY “ ” “ I ” (SIGNAL TRANSMISSION) Use this button for programming “START and/or STOP” This lights up when a signal is being transmitted. time. (Operates with the front cover of the remote con- DISPLAY “ ”...
  • Page 65 Basic screen is displayed. Select Main RC or Sub RC using the Press and hold Press the Cancel (Up/Down) the Cancel button once. buttons, and then button for 4 press the Menu/OK seconds or more. button. Select Switch Main Sub Controller and press the Press the Service...
  • Page 66 The side painted black indicates the switch knob position. Transmitter assembly...
  • Page 67 The side painted black indicates the switch knob position. Transmitter assembly...
  • Page 68 UP button DOWN button Field setting mode FAN button RESERVE button Address Multiple setting FILTER SIGN RESET button INSPECTION/TEST button...
  • Page 70 Basic screen is displayed. Press and hold Press the Cancel the Cancel button once. button for 4 seconds or Select Group Address and more. then press the Menu/OK button. Service Item 2 is settings menu displayed. Press the Cancel is displayed. button once.
  • Page 71 Basic screen is displayed. Press and hold Press the Cancel the Cancel button once. button for 4 seconds or Select Group Address more. and then press the Menu/OK button. Service Item 2 is settings menu displayed. Press the Cancel button is displayed.
  • Page 72 UP button Mode No. Field setting mode DOWN button RESERVE button MODE button Group No. INSPECTION/TEST button...
  • Page 75 Mode number UP button DOWN button RESERVE button MODE button INSPECTION/TEST button...
  • Page 76 Part 4 Functions and Control...
  • Page 77 Operation in stop control Indoor unit stop or Indoor unit thermostat ON thermostat OFF Error/Standby Restart standby Pressure (Compressor stop) equalization prior to startup Error/ Standby Indoor unit stop or thermostat OFF Startup control • Cooling startup Pump down control residual Indoor unit thermostat ON •...
  • Page 80 18/24 class 30/36/42/48 class Step Frequency (Hz) Step Frequency (Hz) 52.5 52.5 61.5 61.5 67.5 85.5 100.5 112.5 118.5 115.5 121.5 128.1 145.5 163.5 154.5 163.5 181.5 178.5 196.5 211.5 223.5 232.5 244.5 253.5 253.5 265.5 277.5 289.5 301.5...
  • Page 82 Upper limit of fan Pc: High pressure sensor detection value revolutions: Step 8 < 2.75 MPa > 3.24 MPa (399 psi) (470 psi) Upper limit of outdoor fan revolutions Step 7 PI control Lapse of 20 seconds PI control Hold the –1 step on +1 step on current step on...
  • Page 83 • Pc – Pe < 0.3 MPa • A lapse of 130 sec. (43.5 psi) • Pc – Pe > 0.39 MPa • A lapse of 1 to 5 min. (56.6 psi)
  • Page 84 • Pc – Pe < 0.3 MPa x A lapse of 130 sec. (43.5 psi) Pc > 2.70 MPa • A lapse of 1 to 5 min. (392 psi) Pc – Pe > 0.39 MPa (56.6 psi)
  • Page 85 x 3 minutes x Pe < 0.6 MPa (87 psi) x 3 minutes x HTdi > 110°C (230°F) x Ts1 – Te < 5qC (9qF)
  • Page 86 x 12 minutes x 160 seconds xTs1 – Te < 5°C (9°F) x Pc – Pe > 0.4 MPa & xTb > 11°C (51.8°F) (58 psi)
  • Page 87 x 12 minutes x 160 seconds x Tb > 11°C (51.8°F) x Pc – Pe > 0.4 MPa & x Ts1 – Te < 5°C (9°F) (58 psi)
  • Page 90 Pc > 3.47 MPa (503 psi) High pressure not limited Compressor upper limit frequency: Maximum High pressure limited Compressor upper limit frequency: 3-step down from current compressor frequency After 10 sec. Pc > 3.47 MPa (503 psi) Current step maintained Pc <...
  • Page 91 High pressure drop Pc > 3.04 MPa (441 psi) High pressure not limited Pc < 2.89 MPa (419 psi) High pressure limited Compressor upper limit frequency: 1-step down from current compressor frequency After 10 sec. Pc > 3.04 MPa (441 psi) Current step maintained Pc <...
  • Page 92 Pe: Low pressure sensor detection value Pe < 0.17 MPa (24.7 psi) Low pressure not limited • Pe > 0.09 MPa (13.1 psi) • Ts – Teg < 8˚C (14.4˚F) & • Pe > 0.06 MPa (8.7 psi) Low pressure limited Compressor upper limit frequency: 3-step down from current compressor frequency...
  • Page 93 Discharge pipe protection control not limited HTdi > 115˚C (239˚F) • • Tp > 135˚C (275˚F) • HTdi < 100˚C (212˚F) & Tp < 110˚C (230˚F) • Compressor upper limit frequency: 1-step down from current compressor frequency After 30 seconds HTdi >...
  • Page 94 Not limited Inverter current ≤ 22 A • & Inverter current > 22 A • Compressor upper limit: Maximum frequency Limited Compressor upper limit frequency: 1-step down from current compressor frequency 10 seconds • Inverter current > 22 A & Matching of frequency •...
  • Page 97 (°F) (°C) Set temperature TH1 = Ts – 1 (Ts) TH1 = Ts + 1 TH1 = Ts – 3 TH1 = Ts + 3 (°C) (°F) Suction temperature (TH1) Range in which remote controller Range in which Differential suction air thermistor thermistor can be used can be used...
  • Page 98 (°F) (°C) Set temperature (Ts) TH1 = Ts – 1 TH1 = Ts + 1 d 31°C TH1 = Ts + 12 d 33°C TH1 = Ts + 10 d 31°C 60 16 (°C) (°F) Suction temperature (TH1) Range in which suction air thermistor Range in which remote controller Differential...
  • Page 99 ∆T ≤ –1.0˚C (–1.8˚F) Normal operation Thermostat OFF (Thermostat ON) ∆T ≥ +1.0˚C (+1.8˚F) ∆T ≥ +1.0˚C (+1.8˚F) Normal operation Thermostat OFF (Thermostat ON) ∆T ≤ –1.0˚C (–1.8˚F) Tr < Tro – 1.0˚C (–1.8˚F) Dry operation Thermostat OFF Tr > Tro + 1.0˚C (+1.8˚F) Tr <...
  • Page 100 ∆T ≤ –1.0˚C (–1.8˚F) Normal operation Thermostat OFF (Thermostat ON) ∆T ≥ +1.0˚C (+1.8˚F) ∆T ≥ +1.0˚C (+1.8˚F) Normal operation Thermostat OFF (Thermostat ON) ∆T ≤ –1.0˚C (–1.8˚F) Tr < Tro – 1.0˚C (–1.8˚F) Dry operation Thermostat OFF Tr > Tro + 1.0˚C (+1.8˚F) Tr <...
  • Page 101 Set heating temperature Set cooling temperature (A – D) Cooling thermostat ON Cooling thermostat OFF Display change Cooling o Heating Display change Heating o Cooling Heating thermostat OFF Heating thermostat ON 3qC (5.4qF) + 2)qC + 3.6)qF (Ex.) When automatic cooling temperature is set to 27qC (80.6qF): Differential value: 0qC (0qF) Differential value set to 4qC (7.2qF) Set cooling/ heating temp.
  • Page 103 Starting condition Ending condition · · Defrost ending Lapse of 3 minutes · · Oil return ending TH2 > 34°C (93.2°F) · · Thermostat ON Tc > 52°C (125.6°F) Hot start control Hot start in progress Normal control H/L remote controller setting The fan is not OFF before initiating the hot start: LL The fan is OFF before initiating the hot start: OFF...
  • Page 104 Existing position Ceiling soiling prevention Standard Setting Draft prevention position position position (Not for Multi flow type) P0'' P1'' P2'' P3'' P4'' Draft prevention Same as existing position position Range of direction adjustment Standard Separated into 5 positions Prohibited (P1 - 4) position Range of direction adjustment Dirt...
  • Page 105 Float switch Thermostat (running) Error display Drain pump 5 min. Float switch Thermostat (running) Error display Drain pump 5 min. 5 sec. 5 min. 5 sec.
  • Page 106 Float switch Thermostat (running) Error display Drain pump 5 min. 5 sec. ∗1 ∗2 ∗3 Float switch Thermostat (running) Error display Drain pump 5 min. 5 min. 5 min. 5 min. 5 min. 5 min. 5 min. 5 sec.
  • Page 107 10 min. Liquid pipe temperature +7ºC (44.6°F) 0ºC (32°F) –5ºC Freeze-up prevention control (23°F) Forced OFF by thermostat Normal operation 10 min. Cancel Start 10 min. +7ºC (44.6°F) 0ºC (32°F) –1ºC Freeze-up prevention control (30.2°F) Forced OFF by thermostat Normal operation t >...
  • Page 108 10 min. Liquid pipe temperature +7ºC (44.6°F) 0ºC Freeze-up prevention control (32°F) Normal operation Forced OFF by thermostat 1 min. Start Cancel 10 min. +7ºC (44.6°F) +1ºC Freeze-up prevention control (33.8°F) Forced OFF by thermostat Normal operation t > 15 minutes Start Cancel...
  • Page 109 2ºC 2ºC (3.6˚F) (3.6˚F) 43ºC 50ºC (122˚F) Liquid pipe temperature (109.4˚F) 50ºC 60ºC (122˚F) (140˚F) Condensing pressure equivalent saturated temperature...
  • Page 111 Heater not allowed • Not in heating/Automatic heating • Heating/Automatic heating & • Auxiliary heater enabled: 1 • Auxiliary heater enabled: 0 (∗3) Heater 1: OFF Heater 2: OFF Heater allowed Thermostat OFF Thermostat OFF/Operation OFF Heater 1: OFF Heater 2: OFF Thermostat OFF Thermostat ON Thermostat ON...
  • Page 112 Condition A • No fan motor system error • High pressure condition: ON (∗1) • Liquid pipe temperature condition: ON (∗2) • Heater ON permission (Defrost/oil Return): 0 (∗4) & & • Not during defrost/oil return • Heater ON permission (Defrost/oil return): 1 (∗4) Condition B •...
  • Page 113 Thermostat OFF/Operation OFF ENTRY/ 5 minutes timer starts. • Condition A & • Time up (∗2) H/P Heating: Not in operation Heater 1: ON Heater 2: OFF Fan: ON Entry/ Condition A 5 minutes timer starts. • Thermostat step 2: ON •...
  • Page 114 • No errors (except errors in which the system keeps operating) has occurred. & • Remote controller ON • Thermostat step 1: OFF Perform the processing in • Thermostat step 2: OFF the following chart. (∗5) • Thermostat step 3: OFF Other conditions n i l Thermostat step 3...
  • Page 115 Residual ON • Heater turned OFF from ON Fan (∗1) Residual OFF ENTRY/ • Heater ON 90 sec. timer starts. • Time up (∗2) • Remote control operation Fan operation at preset tap & (including thermostat OFF) (Fan tap can be changed by field setting •...
  • Page 116 Thermostat ON signal • Cooling mode & • When the thermostat is ON Stop the thermostat ON signal (∗1) Transfer the thermostat ON signal (∗1) to to the economizer. the economizer. Other conditions Operation Normal operation • Cooling mode Other •...
  • Page 117 Part 5 Field Settings and Test Operation...
  • Page 118 <Basic screen> Press and hold Cancel button for 4 seconds or more during backlight lit. <Service Settings menu screen> Press Menu/OK button. <Service Settings screen> In the case of individual In the case of group total setting setting per indoor unit SECOND CODE NO.
  • Page 119 <Setting confirmation screen> Press Menu/OK button. Setting confirmation...
  • Page 120 Mode No. First code Unit No. Second code No. (2)(8) (7)
  • Page 121 UP button Mode No. Field setting mode DOWN button RESERVE button First code No. MODE button Second code No. INSPECTION/TEST button...
  • Page 127 (°F) (°C) 96.8 93.2 In cooling 89.6 Suction air Remote controller Suction air thermistor thermistor thermistor Suction air Remote controller Suction air 82.4 thermistor thermistor thermistor 78.8 75.2 71.6 (°C) 62.6 66.2 69.8 73.4 80.6 84.2 87.8 91.4 98.6 (°F) Suction air temperature (°F) (°C)
  • Page 128 Human detection State of absence (°F) (°C) 87.8 84.2 82.4 80.6 Cooling (at 28°C (82.4°F)) 78.8 69.8 Heating (at 20°C (68°F)) 66.2 64.4 62.2 30 (60)∗ 60 (120)∗ Elapsed time of absence (min.) ∗ The values in parentheses represent the time when Second code No.
  • Page 129 Thermostat Set temperature Thermostat Toff + S(∗1) Ton + S (∗1)
  • Page 133 F2 T1 T2 Forced OFF Input A...
  • Page 134 Caution The air conditioner starts operation suddenly after power failure reset or when the main power supply is turned on again. Consequently, the user might be surprised and wonder why this has happened. In service work, for example, turning off the main power switch while the unit is in operation, and turning on the switch again after the work is completed start unit operation (the fan rotates).
  • Page 142 X51A...
  • Page 143 H1P H3P H5P H7P H2P H4P H6P (SET) (MODE) (RETURN) (TEST) (RESET) Setting mode 1 Press the MODE (BS1) button for more Press the MODE (BS1) button. (Initial condition) than 5 seconds. MODE Setting mode 2 Monitor mode Blinking MODE MODE Select a check item with Select a setting item with...
  • Page 145 Setting mode 1 is the initial status k ON (normal). In case of other status, h OFF press the MODE (BS1) button one l Blink time and return to the setting mode 1. Setting (displaying) item COOL/HEAT select MODE TEST DEMAND NOISE MASTER...
  • Page 146 Press the MODE (BS1) button for 5 Cool / heat unified seconds and enter the setting mode Sets address for cool / heat unified operation. address Low noise / demand Address for low noise / demand operation address Used to conduct test operation without making changes to the Test operation settings PCB and replacing the refrigerant, after the completion of maintenance.
  • Page 147 Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory setting k h h h h h h ∗ Address k h h h h h k Binary number Cool / heat unified address k h k k k k k k h h h h h h ∗...
  • Page 148 Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory setting k h h h h h k Level 1 (outdoor fan with 6 step or lower) k h h h h k h ∗ 25 Setting of low noise level Level 2 (outdoor fan with 5 step or lower) k h h h k h h...
  • Page 149 Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory setting k h h h h h h –17.7°C (0°F) k h h h h h k –15°C (5°F) k h h h h k h –12.2°C (10°F) k h h h h k k –9.4°C (15°F)
  • Page 150 LED display Press the MODE (BS1) button and Setting item Data display enter the monitor mode. H3P H4P l h h h h h h Various setting See the note below. l h h h h h k Cool / heat unified address l h h h h k h Low noise / demand address l h h h h k k...
  • Page 151 Figure 1 l h l h l l h Figure 2 l h h h l h l 64 16 No.12 128 32 l h h h l l h No.13...
  • Page 152 If capacity precedence is set in capacity Operation sound precedence setting, the fan speed will be increased according to the load of air Time set with night-time low noise start setting Time set with night-time low noise end setting conditioning when load is heavier. Rated Operation sound during Night-time...
  • Page 153 Power consumption When the Constant demand setting is set to ON Rated (OFF has been set at factory.) , the power 80 % consumption can be 70 % set with the Demand 1 60 % level setting. (70 % of The power consumption set with Demand 1 level setting.
  • Page 154 : ON : OFF : Blink Setting Setting i t t ng No. indication Setting Setting contents indication (Initial setting) contents contents H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P External low noise / (Factory...
  • Page 156 LED display (H1P~H7P) ( BLINK) Unit stopping h h k h h h h Press the TEST button for 5 seconds. Step 1 Pressure equalizing h l h h h h k 10 seconds to 10 minutes Step 2 Cooling start control h l h h h k h 20 seconds to 2 minutes Step 3...
  • Page 157 Setting item display Setting condition display C/H selection Setting item MODE TEST Demand noise Master Slave ∗ Factory setting k h h h h h h –17.7°C (0°F) k h h h h h k –15°C (5°F) k h h h h k h –12.2°C (10°F) k h h h h k k –9.4°C (15°F)
  • Page 158 Setting item display Setting condition display C/H selection MODE TEST Demand Setting item noise Master Slave ∗ Factory setting ∗ k h h h h h k Setting of heat pump k h h h h k h lockout 1 ∗...
  • Page 159 Setting item display Setting condition display C/H selection Setting item MODE TEST Demand noise Master Slave ∗ Factory setting k h h h h h h ∗ –26.1°C (–15°F) k h h h h h k –23.3°C (–10°F) k h h h h k h –20.5°C (–5°F) k h h h h k k –17.7°C (0°F)
  • Page 167 Part 6 Service Diagnosis...
  • Page 171 MPa G psi G –0.1 –15 –50 –40 –30 –20 –10 °C –58 –40 –22 –4 °F Temperature...
  • Page 172 Knob Tripped Circuit breaker...
  • Page 176 Is the individual Normal airflow set? Reset (Cancel) individual airflow. Is the Is the automatic draft prevention airflow direction set to Normal function "enabled"? automatic? Automatic draft prevention function switches flap to horizontal position when human presence is detected. Is the Is the connection Replace the wire wire harness...
  • Page 177 Screen Operation lamp Error code A6-01 FCQ18TAVJU Applicable RZR18TAVJU model names...
  • Page 178 UP button DOWN button Unit number MODE button INSPECTION/TEST button O0 A C E H F J L P U 9 8 7 6 5 4 "UP" button "DOWN" button...
  • Page 179 0 1 2 3 4 5 6 7 8 9 A H C J E F "UP" button "DOWN" button 2. Change the unit number with Normal mode UP button or DOWN button. 1. Press INSPECTION/TEST button to enter inspection mode. If no button is pressed for 1 minute, equipment returns to normal mode.
  • Page 184 Monitor mode To enter the monitor mode, press Error Description Error Code the MODE (BS1) button when in PCB abnormality “Setting mode 1”. Abnormal high pressure switch High pressure switch activated Abnormal low pressure switch Low pressure switch activated inverter compressor lock Overload, overcurrent, Detection of DC fan 1 motor lock abnormal lock of outdoor fan motor...
  • Page 185 k: ON h: OFF l: Blink Confirmation of Error 1 Confirmation of Error 2 Confirmation of Error 3 Confirmation of Error 4 Error Code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P Display of error Display of error description Display 1 of...
  • Page 186 Monitor mode Error Description Error Code To enter the monitor mode, press Inverter circuit capacitor high voltage Imbalance of inverter power supply the MODE (BS1) button when in voltage “Setting mode 1”. Defective temperature sensor of Defective thermistor of inverter fin inverter radiation fin Refrigerant shortage Refrigerant shortage alarm...
  • Page 187 k: ON h: OFF l: Blink Confirmation of Error 1 Confirmation of Error 2 Confirmation of Error 3 Confirmation of Error 4 Error Code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P Display 1 of Display 2 of Display of error...
  • Page 188 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. External protection device is connected to Activation of external protection terminals T1 and T2 of the device. indoor unit terminal block. Check the setting state of the ON/OFF input by remote controller.
  • Page 189 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. External The external protection device protection device is is connected to TB4 and Activation of external protection TB5 of the indoor unit opened.
  • Page 190 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn the power supply OFF, then the power ON again. Does the The indoor unit main system return to PCB (A1P) is normal. normal? External factor other than error (for example, noise...
  • Page 192 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the Is the drain pump short circuit connector connected to the mechanism connected? Short circuit connector indoor unit PCB? connection ( 1) Check the continuity of short...
  • Page 194 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power supply, and then wait for a period of 10 minutes. Are there any foreign matter Remove the foreign matter. around the fan? Is the connector properly...
  • Page 195 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the connector securely Properly connect the connectors. connected? (At this time, check for any defective connector contact or broken wires.) Is the power of 12 VDC supplied...
  • Page 197 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power and wait for 10 minutes. There is a foreign matter around Remove the foreign matter. the fan. The fan motor connectors (X1A and Connect the connector...
  • Page 198 The resistance among U, V, and W are unbalanced Replace the indoor fan motor. or short circuited. CHECK 16 Remove the signal connector from the fan motor and check the resistance. Between V and GND terminals, and between GND Replace the indoor fan and H , or H terminals are...
  • Page 203 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the connector ( 1) Connect correctly. correctly connected? the limit switch's connector Connect correctly. ( 2) correctly connected? Turn the power supply OFF once and back ON, and check whether the swing flap motor swings when the power...
  • Page 204 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the condition of the power supply. (1) Check if power supply voltage is 208-230 V ± 10%. (2) Check if there is power open phase or defective wiring. (3) Check if power supply voltage side unbalance is within 6 V.
  • Page 207 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Power is supplied. Replace the electronic expansion valve main body. Electronic expansion valve is Shut the power supply OFF after connected to X7A connection and then restart.
  • Page 208 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the drain pump kit Check the connector X15A. connected ? Is the drain pump Check the drain pump piping. normal ? Is the quantity of condensed water after...
  • Page 209 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. The indoor unit PCB was Replace the indoor unit main PCB replaced with a spare (A1P). PCB. capacity setting adaptor need to be Replace the indoor unit main PCB installed when (A1P).
  • Page 210 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the connector between indoor unit PCB (A1P) and fan Connect the connector accurately. PCB (A2P) accurately connected? ( 1) Confirm the condition of transmission on indoor unit PCB using field setting mode.
  • Page 213 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Remove the thermistor from the indoor unit PCB. Then, insert the connector again. Is the thermistor Normal (The error is caused by normal? defective contact.) Remove the thermistor from...
  • Page 214 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Does the fan PCB part Replace it with correct fan PCB No. match that of the spare parts list? (A2P). Was the indoor unit PCB After establishing transmission for (A1P) replaced...
  • Page 217 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the Field setting optional remote sensor Set to 03. 10(20)-2 is set to 03. is installed? Replace the indoor unit PCB. Connector is connected to the Connect the sensor and turn ON...
  • Page 218 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Error type varies according to error code. Check the error code and take the following steps. Error code See diagnosis procedure 1. CE-01 Error code See diagnosis procedure 2.
  • Page 219 Diagnosis procedure 1 Infrared presence sensor error (Error code CE-01) Is the connection of the connector on infrared presence Connect the connector correctly. sensor PCB (A4P) and the connector X2A on A2P normal? Is the connection of the Connect the connector correctly. sensor connector normal? Check infrared presence sensor output;...
  • Page 220 Diagnosis procedure 2 Infrared floor sensor error (Error code CE-02) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB (A3P) and the connector X2A on A2P normal? Is the connection of the Connect the connector correctly. sensor connector normal? Check infrared floor sensor output;...
  • Page 221 Diagnosis procedure 3 Infrared floor sensor error (Error code CE-03) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB (A3P) and the connector X2A on A2P normal? Is the connection of the Connect the connector correctly. sensor connector normal? Check infrared floor sensor output;...
  • Page 222 Diagnosis procedure 4 Infrared floor sensor error (Error code CE-04) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB (A3P) and the connector X2A on A2P normal? Is the connection of the Connect the connector correctly. sensor connector normal? Check infrared floor sensor output;...
  • Page 223 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Clear the error code history. ( 1) Error is displayed again. Replace the remote controller. External factor other than equipment error. (for example, noise etc.)
  • Page 224 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power once and turn ON again. External factor other than Return to normal? error (for example, noise etc.). Check if inside/ outside relay wires of...
  • Page 226 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check for the points shown below. (1) Is the stop valve open? (2) Is the high pressure switch connector properly connected to the main PCB? (3) Does the high pressure switch have continuity? Are the three points Rectify the defective points,...
  • Page 228 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the stop Open the stop valve. valve open? Is the indoor unit failing? (Does the remote controller Eliminate the indoor unit error. display an error other than E4?) (1) Mount a pressure gauge on the low pressure...
  • Page 229 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the stop valve open? Onsite causes. Open the stop valve. Power OFF Check the compressor cable for disconnection and flaws. The compressor cable Replace the cable, and has a defect.
  • Page 230 insulation resistance is Replace the compressor. low (i.e., not more than 100 k:.) Power OFF Check the compressor motor coil for any broken wire. Some phase has a broken wire. Restart the compressor, and then End of work check whether or not Defective pressure the error recurs.
  • Page 233 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn power supply OFF, and turn power supply ON again. Return to normal? External factor other than error (for example, noise etc.). The connector of outdoor main PCB (A1P) Ensure correct connection.
  • Page 234 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. When the unit stops operating because of Short of refrigerant, an error, is the discharge pipe compressor failure, etc. temperature higher than refrigerant system failure.
  • Page 235 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the mounting condition of the outdoor air temperature thermistor, heat exchanger deicer thermistor and liquid pipe thermistor in the piping. Are the above thermistor installed on Install the thermistor correctly.
  • Page 236 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Connector is Connect the connector and turn on connected to outdoor again. unit PCB. Resistance is normal when measured after disconnecting the thermistor Replace the defective thermistor.
  • Page 237 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Does the high-pressure sensor connect to the corresponding connector of Connect to the high-pressure the outdoor main sensor and then reconnect to the PCB (A1P)? power.
  • Page 238 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Does the low pressure sensor connect to the Connect the low pressure sensor designated connector of the (S1NPL) correctly and then restart outdoor main PCB operation.
  • Page 239 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power. Then, turn on the power again. Does the power It is supposed that the error results supply normally come from external causes other than back on? failures (e.g.
  • Page 240 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the radiator fin temperature greater than the Defective radiation from the power designed temperature? unit • Blocked air suction port •...
  • Page 241 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Insulation resistance of Replace the inverter the compressor compressor. is 100 k: or below. Compressor coils are Replace the inverter disconnected. compressor.
  • Page 242 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check if the Replace the compressor compressor lead wires are normal. lead wires. Insulation resistance of the compressor Replace the inverter is 100 k: or below.
  • Page 243 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. When operation starts, is the high and low Nonconforming pressure pressure difference greater than 0.2 MPa balance. Check the (29.0 psi)? refrigerant system.
  • Page 244 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the Replace the outdoor outdoor main PCB damaged? main PCB. Inverter compressor insulation Replace the inverter resistance is less than compressor.
  • Page 245 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Measure voltage between L1 and L2, L1 and L3, and L2 and L3. Is three-phase power Calibrate the power voltage. voltage within rated voltage ±10%? Is the unbalanced phasic voltage...
  • Page 246 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Measure resistance value of the radiation fin thermistor. CHECK 11 * Disconnect the connector (X111A) from the radiation fin thermistor, and then check the thermistor. Is the thermistor Replace the outdoor resistance value normal?
  • Page 248 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the low pressure less or equal to 0.25 MPa Short of refrigerant, closed stop Is it cooling? (36.3 psi)? valve, or blocked cooling system.
  • Page 250 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the power supply voltage between L1 and L2, Calibrate the power voltage. L2 and L3, and L1 and L3 within If L2 and Phase N are disconnected, 208 V –10% to 230 V replace the distribution box.
  • Page 251 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Has the check operation performed Press TEST (BS4) button on on outdoor unit master outdoor unit PCB for 5 PCB? seconds or longer to check operation.
  • Page 252 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Has the indoor or outdoor unit PCB been replaced, or has the Press and hold the RESET indoor-outdoor unit (BS5) button on the master transmission wiring outdoor unit PCB for 5 seconds.
  • Page 253 Outdoor unit PCB Replace the outdoor main microcomputer monitor PCB (A1P). (HAP) blinks. Operation ready lamp (H2P) is blinking. Lamp does not go Press and hold the RESET off for 12 minutes or (BS5) button on the outdoor more. unit PCB for 5 seconds. indoor-outdoor unit Fix the indoor-outdoor transmission wiring...
  • Page 256 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn ON all indoor units. All the units are Continue the operation. indicating U9. U9 has been displayed for 2 minutes Re-diagnose by display after or more.
  • Page 258 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the outdoor unit PCB Check the model name of the replaced by the backup PCB? outdoor unit PCB and then replace the old one.
  • Page 260 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Does the optional remote controller for Address duplication on the centralized controller connect to the indoor unit? centralized controller. Change the setting to avoid centralized controller address duplication.
  • Page 261 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. transmission wiring disconnected or Fix the wiring correctly. wired incorrectly? Has an indoor unit once connected been removed Reset power supply or its address simultaneously for all optional changed?
  • Page 262 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Are the stop valves Open stop valve. opened? Is the check indoor-outdoor unit operation carried Press RETURN (BS3) button transmission wiring out? on outdoor unit PCB for 5 normal?
  • Page 263 Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Does electricity an error being introduced occur even after for the first time after 12 minutes elapses installation or after an from the time when Normal indoor or outdoor unit...
  • Page 264 Stop valve closed mCheck to be sure the stop valve is open. Local High pipe Bent or crashed pipe ←Conduct visual checks for pipe conditions. pressure resistance rise Clogging of foreign ←Is there any temperature difference caused before materials and after the filter or branch pipe? [In cooling] If the outdoor unit electronic Defective outdoor...
  • Page 265 [In cooling] Defective low pressure ←Is the pressure value checked with the Service Checker ( 1.) sensor Defective corresponding to the measurement value of the pressure sensor? compressor Defective Defective main PCB ←Are the voltage characteristics normal? capacity low pressure control control ←Is the pressure value checked with the Service Checker Defective low pressure...
  • Page 266 Hot gas circuit clogging Defective hot Defective solenoid gas bypass ←Are the coil resistance and insulation normal? valve coil control Defective solenoid valve body ( 1) Defective service monitor PCB Defective valve coil ←Are the coil resistance and Defective insulation normal? subcooling Defective valve Defective...
  • Page 268 Cooling High pressure dropping control Frequency comes to High pressure the minimum level. gradually rises with increase in frequency. Subcooling degree becomes higher. (Liquid connection High pressure pipe temperature lowers.) (Low pressure is maintained at a constant level.) Low pressure Low pressure rises due to decreased compressor output.
  • Page 269 Cooling Fan control is activated for high The opening degree of the indoor unit pressure protection under electronic expansion valve becomes cooling control at low outdoor larger. Either of the electronic expansion air temperature, i.e., the fan is valves becomes fully open. hunting at high pressure.
  • Page 272 Transmission error When transmissions between the microcomputers on the main PCB are not normal Instantaneous overcurrent of inverter compressor (When inverter output current exceeds 59.1 A even instantaneously) Overcurrent of inverter compressor (1) A current of 33.5 A or more continues for a period of consecutive 5 seconds.
  • Page 276 4.15 4.15 Detected Pressure (MPa) = × V – × 0.5 (psi) (kg/cm (MPa) (MPa) = × V – × 0.5 51.0 1 MPa = 145 psi : High pressure (MPa) 45.9 : Low pressure (MPa) High Pressure (P : Output Voltage (High Side) (VDC) 40.8 : Output Voltage (Low Side) (VDC) 35.7...
  • Page 277 Short circuit between the indoor-outdoor unit Check the transmission terminal parts. wiring for continuity. Indoor-outdoor Unit If there is continuity, the Transmission Wiring indoor-outdoor unit transmission has no broken wires in it. Outdoor unit...
  • Page 278 X20A 1 White 2 Orange 3 Brown 4 Blue 5 — — 6 — — 7 Red 1 Red 2 White 3 Black...
  • Page 279 Connector power wire use (X1A) Connector signal wire use (X2A) 5 Gray 5 Red 4 Pink 4 — 3 Orange 3 White 2 Blue 2 — 1 Yellow 1 Black Connector for signal wires (X106A, X107A) 1 White 2 Orange 3 Brown 4 Blue 5 —...
  • Page 280 Orange 1 Red 2 Yellow 3 Black 4 — 5 Gray 6 White 1 Yellow 2 Orange 3 Blue 4 Red 5 Brown 6...
  • Page 281 Blue Brown Orange Yellow White X21A (Y1E) (White) 1 (Yellow) 2 (Orange) 3 (Blue) 4 — (Red) 6...
  • Page 282 X21A (Y1E) X22A (Y3E) (Orange) 1 (Red) 2 (Yellow) 3 (Black) 4 Com-A[+] (Gray) 5 COM-B[+] (White) 6...
  • Page 283 Part 7 Appendix...
  • Page 290 208/230 (SEE NOTE 4) GROUND LUG HEATER KIT (SEE NOTE 5) DISCONNECT SWITCH WIRING INSTALLING AUX ALARM (ALARM) (SEE NOTE 6) (SEE NOTE 1) (SEE NOTE 1) 24VAC 24VAC RELAY IN (ACC-IN) HEATER KIT RELAY OUT OUTPUT (ACC-OUT) TB10 OUTPUT FOR CONTROL ON/OFF EEV COIL (OPTION)
  • Page 291 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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