Page 1 INVERTER PACKAGED AIR-CONDITIONERS (Split system, air to air heat pump type) HYPER INVERTER MICRO INVERTER FLOOR STANDING TYPE FLOOR STANDING TYPE Single type Twin type Single type Twin type FDF71VNXWVH FDF140VNXWPVH FDF100VNAWVH FDF140VNAWPVH 100VNXWVH 140VSXWPVH 100VSAWVH 140VSAWPVH 100VSXWVH 125VNAWVH 200VSAWPVH...
Page 2: Micro Inverter Packaged Air-Conditioners
'22 • PAC-SM-426 TABLE OF CONTENTS 1. HYPER INVERTER PACKAGED AIR-CONDITIONERS ........2 2. MICRO INVERTER PACKAGED AIR-CONDITIONERS ........191 3. STANDARD INVERTER PACKAGED AIR-CONDITIONERS ......225...
Page 3 '22 • PAC-SM-426 1. HYPER INVERTER PACKAGED AIR-CONDITIONERS CONTENTS 1.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 　 ....1.1.1 Remote control (Option parts) 　 ............1.1.2 Operation control function by the wired remote control 　 ....1.1.3 Operation control function by the indoor control 　 ......10 (1) Auto operation 　...
Page 4 '22 • PAC-SM-426 (32) Auto fan speed control (RC-EX3A only)　..........25 (33) Indoor unit overload alarm (RC-EX3A only)　........... 25 (34) Peak-cut timer (RC-EX3A only)　 ............. 25 (35) Motion sensor control (Option, RC-EX3A and RCN-E2 only)　 ....26 (36) Refrigerant leak detection control　 ............29 (37) Refrigerant sensor control　...
Page 5 '22 • PAC-SM-426 '16 • PAC-T-251 1.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.1.1 Remote control 1.10.1 Remote control (1) Wired remote control ｝ ※Hereafter, the two remote controls on the Installed wired remote control (Equivalent to RC-EX3A) Wired remote control 　left will both be referred to as RC-EX3A.
Page 6 '22 • PAC-SM-426 Wired remote control Model RC-E5 Model RC-E5 The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation. Characters displayed with dots in the liquid crystal display area are abbreviated.
Page 7 '16 • PAC-T-251 '22 • PAC-SM-426 Wireless remote control (2) Wireless remote control RCN-E2 Indication section ① OPERATION MODE display Indicates selected operation mode. SET TEMP display Indicates set temperature. SLEEP TIMER time display Indicates the amount of time remaining on the sleep timer. ②...
Page 8 '16 • PAC-T-251 '22 • PAC-SM-426 1.10.2 Operation control function by the wired remote control 1.1.2 Operation control function by the wired remote control ●Model RC-EX3A ● Model RC-EX3A (1) Switching sequence of the operation mode switches of remote control (1) Switching sequence of the operation mode switches of remote control (a) Tap the change operation mode button on the TOP screen.
Page 9 '22 • PAC-SM-426 ●Content memorized with the power failure compensation are as follows. Note(1) Items (f) and (g) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled regardless whether the power failure compensation is effective or not. At power failure –...
Page 10 '22 • PAC-SM-426 ● Model RC-E5 (1) Switching sequence of the operation mode switches of remote control COOL HEAT AUTO (2) CPU reset This functions when “CHECK” and “ESP” buttons on the remote control are pressed simultaneously. Operation is same as that of the power source reset.
Page 11 '22 • PAC-SM-426 1.1.3 Operation control function by the indoor control (1) Auto operation (a) If “Auto” mode is selected by the remote control, the heating and the cooling are automatically switched according to the difference between outdoor air temperature and setting temperature and the difference between setting temperature and return air temperature. (When the switching of cooling mode ↔ heating mode takes place within 3 minutes, the compressor does not operate for 3 minutes by the control of 3-minute timer.) This will facilitate the cooling/heating switching operation in intermediate seasons and the adaptation to unmanned operation at stores, etc (ATM corner of bank).
Page 12 '22 • PAC-SM-426 (ii) Regardless of the setting temperature, the cooling or heating operation mode is judged according to the "Judgment based on Room temperature/Cooling or Heating and Outdoor temperature/Cooling or Heating". 1) I n case of "Room temperature/Cooling < Indoor return air temperature" and "Outdoor temperature/Cooling < Out- door air temperature"...
Page 13 '22 • PAC-SM-426 (3) Dehumidifying (DRY) operation Return air temperature sensor [Thi-A (by the remote control when the remote control temperature sensor is enabled)] controls the indoor temperature environment simultaneously. (i) Operation is started in the cooling mode. When the difference between the return air temperature and the setting temperature is 2°C or less, the indoor fan speed is brought down by one.
Page 14 '22 • PAC-SM-426 (v) Combination of patterns which can be set for the timer operations Item Sleep timer OFF timer ON timer Weekly timer Item Sleep timer Í Í OFF timer Í Í ON timer Í Weekly timer Í Í Í...
Page 15 '22 • PAC-SM-426 (6) Hot keep Hot keep control is performed at the start of the defrost operation. (a) Contents of operation (i) When the indoor heat exchanger temperature (detected with Thi-R1 or R2) drops to less than 35°C, the speed of indoor fan follows fan setting at the time of thermostat OFF.
Page 16 '22 • PAC-SM-426 (8) Thermostat operation (a) Cooling (i) Thermostat is operated with the room temperature control. (ii) Thermostat is turned ON or OFF relative to the setting room temperature as shown below. Thermostat ON Temperature drop Thermostat OFF Temperature rise Setting room temperature (iii) Thermostat is turned ON when the room temperature is in the range of -1 <...
Page 17 '22 • PAC-SM-426 (d) Fan control during cooling thermostat OFF (i) Following fan controls during the cooling thermostat OFF can be selected with the indoor function setting of the wired remote control. ① Low fanspeed ② Set fan speed (Factory default) ③ Intermittence ④ Fan OFF (ii) When the “Low fan speed”...
Page 18 '22 • PAC-SM-426 (11) Operation check mode (a) If the power is turned on by the DIP switch (SW7-1) on the indoor unit control PCB when electric power source is supplied, it enters the mode of operation check. It is ineffective (prohibited) to change the switch after turning power on. (b) When the communication with the remote control has been established within 60 seconds after turning power on by the DIP switch (SW7-1) ON, it enters the operation check mode.
Page 19 '22 • PAC-SM-426 (15) Plural unit control – Control of 16 units group by one remote control (a) Function One remote control can control a group of multiple number of unit (Max. 16 indoor units). “Operation mode” which is set by the remote control can operate or stop all units in the group one after another in the order of unit. No. .
Page 20 '22 • PAC-SM-426 (17) Abnormal temperature sensor (return air/indoor heat exchanger) broken wire/short-circuit detection (a) Broken wire detection When the return air temperature sensor detects -50°C or lower or the heat exchanger temperature sensor detect -50°C or lower for 5 seconds continuously, the compressor stops. After 3-minute delay, the compressor restarts but, if it is detected again within 60 minutes after the initial detection for 6 minutes continuously, stops again (the return air temperature sensor: E7, the heat exchanger temperature sensor: E6).
Page 21 '22 • PAC-SM-426 (b) Input for external control The external input for the indoor unit can be selected from the following input. Input name Content 1 Run/Stop Refer to [(18) (c) Remote operation input] 2 Premission/Prohibition Refer to [(19) Operation permission/prohibition] 3 Cooling/Heating Refer to [(21) Selection of cooling/heating external input function] 4 Emergency stop...
Page 22 '22 • PAC-SM-426 Individual operation (Factory default) All units operation (Local setting) Only the unit Only the unit All units in one All units in one directly connected CnT-6 or directly connected remote control remote control to the remote CnTA to the remote control system can be system can be...
Page 23 '22 • PAC-SM-426 (a) In case of CnT ① Operation stop level > CnTA ③ Operation permission/prohibition level Operation Operation Operation Stop Stop Stop Level input Operation permission Operation permission CnTA Operation prohibition Operation permission/ prohibition setting Operation Operation( ) Operation Stop Stop...
Page 24 '22 • PAC-SM-426 (20) Temporary stop input In case of temporary stop, operation lamp of remote control lights, but indoor/outdoor unit stop the operation. (a) In case of “level input” setting (Factory default) Input signal to CnT-6 or CnTA is OFF → ON : Temporary stop Input signal to CnT-6 or CnTA is OFF → ON : Normal operation CnT-6 or CnTA input Actual operation Temporary stop Temporary stop Remote control...
Page 25 '22 • PAC-SM-426 (22) Fan control at heating startup (a) Starting conditions At the start of heating operation and after the end of hot start control, if the difference of setting temperature and return air temperature is 5°C or higher, this control is performed. (b) Contents of control (i) Sampling is made at each minute and, when the indoor heat exchanger temperature (detected with Thi-R) is 37°C or higher, present number of revolutions of indoor fan speed is increased by 10min...
Page 26 '22 • PAC-SM-426 (30) Fan circulator operation (RC-EX3A only) When the fan is used for circulation, the unit is operated as follows depending on the setting with the remote control. (a) If the invalid is selected with the remote control, the fan is operated continuously during the fan operation. (normal fan mode) (b) If the valid is selected with the remote control, the fan is operated or stopped when on the difference of the remote control temperature sensor and the return air temperature sensor becomes bigger than 3°C.
Page 27 '22 • PAC-SM-426 (35) Motion sensor control (Option, RC-EX3A and RCN-E2 only) The sensor determines the presence of people and the amount of activity, and the following controls are done by the motion sensor. Following settings are necessary to activate motion sensor control. (a) Infrared (motion) sensor setting: Installation setting of remote control Installed wired remote control The indoor unit which is set to “Enable”...
Page 28 '22 • PAC-SM-426 button to set the time, and tap the button. You can set the time from one to 50 hours in one-hour increments. Temporarily determine the time from when the unit enters the "Operation wait" state to when "Complete stop"...
Page 29 Back Select the item. '22 • PAC-SM-426 RCN-E2 1. Set indoor functions ① Press the ON/OFF button to stop the unit. ② Press the desired one of the buttons shown item 2. while holding down the ① ② FUNCTION SETTING switch. ②...
Page 30 '22 • PAC-SM-426 (36) Refrigerant leak detection control A refrigerant sensor at the bottom of the indoor unit constantly detects refrigerant leakage while the unit is energized. (a) Starting condition (i) When the refrigerant sensor detects a refrigerant leak (An “alarm” output is issued from refrigerant sensor connector CN1-2.) (b) Control contents (i) The remote control will display “E23 Refrigerant is leaking.
Page 31 '22 • PAC-SM-426 1.1.4 Operation control function by the outdoor control (1) Determination of compressor speed Required compressor speed (a) Cooling/dehumidifying operation Unit: rps Model FDC71 FDC100 FDC125 FDC140 Usual operation Silent mode, outdoor air temperature ≦ 15°C Max. required Silent mode II compressor speed When SW3-4 ON ( FDC71 )
Page 32 '22 • PAC-SM-426 (2) Compressor start control (a) Compressor starts upon receipt of the thermostat ON signal from the indoor unit. (b) However, at initial start after turning the power source breaker, it may enter the standby state for maximum 30 minutes (“...
Page 33 '22 • PAC-SM-426 (4) Outdoor fan control (a) Outdoor fan tap and fan motor speed Unit: min Model Mode Fan motor tap speed speed speed speed speed speed speed ① ② ③ ④ ⑤ ⑥ ⑦ FDC71 Cooling/Dehumidifying Heating speed speed speed speed...
Page 34 '22 • PAC-SM-426 (d) Outdoor fan control at cooling low outdoor air temperature (i) If the outdoor air temperature (Tho-A) is in the zone in the cooling/dehumidifying mode, outdoor fan is controlled with ±5 – ±20min-1 to keep high pressure level which is controlled by outdoor heat exchanger temperature (Tho-R1, R2).
Page 35 '22 • PAC-SM-426 (f) Outdoor fan control by the power transistor radiator fin temperature (FDC100-140 only) When all the following conditions are established later than 3 minutes after the start of compressor, the following control is implemented (i) Cooling/dehumidifying 1) Outdoor air temperature (Tho-A) 33°C 2) Actual compressor speed A rps...
Page 36 '22 • PAC-SM-426 (5) Defrost operation Models FDC71-140 (a) Starting conditions If all of the following defrost conditions A or conditions B are satisfied, the defrost operation starts. (i) Defrost conditions A 1) Accumulative compressor operation time after the end of defrost operation has elapsed 37 minutes, and the accumulative compressor operation time after the Defrost operation start start of heating operation (remote control ON) has...
Page 37 '22 • PAC-SM-426 (c) Switching of defrost control with SW3-1 (i) If SW3-1 on the outdoor control PCB is turned to ON, it becomes easier to enter the defrost operation. Use this when installing a unit at snowing regions. (ii) Control contents 1) It allows entering the defrost operation under the defrost condition A when the accumulative heating operation time becomes 30 minutes.
Page 38 '22 • PAC-SM-426 (c) Heating high pressure protection (i) Protective control 1) As the indoor heat exchanger temperature (Thi-R) exceeds the setting value, the compressor speed is controlled to suppress the rise of high pressure. 2) Control value A is updated to an optimum value automatically according to the operating conditions. Existing piping adaptation switch: SW5-1 (SW8-1: model FDC71) Reduces compressor speed Model...
Page 39 '22 • PAC-SM-426 (f) Over-current protection current safe controls I, II Detecting the outdoor inverter input (primary) current and the output (secondary) current, if the current values exceed setting values, the compressor speed is controlled to protect the inverter. Reduces compressor speed Cooling Heating at each minute.
Page 40 '22 • PAC-SM-426 ( k ) Dewing prevention control (FDC100-140 only) [Control condition] During cooling and dehumidifying operation, if all the following conditions are established, the compressor speed is reduced to prevent dewing and water splash. (i) Cooling electronic expansion valve aperture (EEVC) is 500 pulses. (ii) Suction superheat is 10°C or higher.
Page 41 '22 • PAC-SM-426 (7) Silent mode (a) As “Silent mode start” signal is received from the remote control, it operates by dropping the outdoor fan speed and the compressor speed. (b) For details, refer to items (1) and (4) above. (8) Test run (a) It is possible to operate from the outdoor unit using the DIP switch on the outdoor unit control PCB.
Page 42 '22 • PAC-SM-426 (10) Base heater ON/OFF output control (Option, FDC100-140VN(S)X-W only) (a) Base heater ON conditions When all of following conditions are satisfied, the base heater is turned ON. ・ Outdoor air temperature (detected with Tho-A) is 1ºC or lower. ・ In the heating mode ・ When the compressor is turned ON ・...
Page 43 '22 • PAC-SM-426 1.2 MAINTENANCE DATA 1.2.1 Diagnosing of microcomputer circuit (1) Selfdiagnosis function (a) Check indicator table Whether a failure exists or not on the indoor unit and outdoor unit can be know by the contents of remote control error code, indoor/outdoor unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp).
Page 44 '22 • PAC-SM-426 (ii) Outdoor unit 1) FDC71-140VNX-W, 100-140VSX-W FDC100-140VNA-W, 100-140VSA-W Outdoor Indoor unit control Outdoor unit control Remote control inventer Reference Location of trouble Description of trouble Repair method page Green Green Yellow Error code Red LED Red LED Red LED LED (1) LED (1)
Page 45 '22 • PAC-SM-426 2) FDC200, 250, 280VSA-W Outdoor Remote control Indoor control PCB Outdoor control PCB inventer Reference Location of trouble Description of trouble Repair method page Green Green Yellow Error code Red LED Red LED Red LED LED (1) LED (1) Installation or operating •...
Page 46 '22 • PAC-SM-426 3) FDC71, 90, 100VNP-W Remote control Indoor unit control PCB Reference Location of trouble Description of trouble Repair method Green Error code Red LED Red LED page Installation, operation status • Higher outdoor heat exchanger temperature Repair Replacement, repair Outdoor heat exchanger Keeps...
Page 47 '22 • PAC-SM-426 (iv) Display sequence of error codes or inspection indicator lamps ■ Occurrence of one kind of error Displays are shown respectively according to errors. ■ Occurrence of plural kinds of error Section Category of display Error code on remote •...
Page 48 '22 • PAC-SM-426 ■ Error log and reset Error indicator Memorized error log Reset Remote control display • Higher priority error is memorized. • Stop the unit by pressing the ON/OFF switch of remote control. Red LED on indoor unit control PCB •...
Page 49 '22 • PAC-SM-426 (b) Instruction of how to replace indoor unit control PCB SAFETY PRECAUTIONS Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. The precautionary items mentioned below are distinguished into two levels, WARNING and CAUTION. Both mentions the important items to protect your health and safety so strictly follow them by any means.
Page 50 '22 • PAC-SM-426 iv) Control PCB Parts mounting are different by the kind of PCB. LED2 (Green) LED3 (RED) PSC012D181 b) Power PCB This PCB is a general PCB. Replace the PCB according to this instruction. i) Replace the PCB 1) Replace the PCB only after all the wirings connected to the connector are removed.
Page 51 '22 • PAC-SM-426 ●DIP switch setting list Switch Description Default setting Remark Address No. setting at plural indoor units control by 1 R/C SW5-1 Master * /Slave Master/Slave setting See table 2. SW5-2 SW6-1 SW6-2 Model selection As per model See table 1.
Page 52 '22 • PAC-SM-426 c) Refrigerant sensor This indoor unit uses refrigerant sensor. They may react with gases (*1) other than the refrigerant. If gas in dense concentration is present near the indoor unit when the power is supplied, the refrigerant sensor detects it and stops the unit with the error (E23).
Page 53 '22 • PAC-SM-426 (4) Troubleshooting at the outdoor unit When troubleshooting the outdoor unit, firstly assess the overview of malfunction and try to presume the cause and the faulty part by checking the error code dispalyed on the remote control and flashing pattern of indicator lamps (Red LED and Green LED), and then proceed further inspection and remedy it. Self-diagnosis system by microcomputor on indoor unit and outdoor unit PCB can assist to find the cause of malfunction smoothly by making a diagnosis of not only the anomaly of microcomputer, but also the anomaly in power source system, installation space, overload resulting from improper charging amount of refrigerant and etc.
Page 54 '22 • PAC-SM-426 PCA012D049A (i) Model FDC71VNX-W (i) Model FDC71VNX-W (i) Model FDC71VNX-W 1) Replace the PCB after elapsing 3 minutes from power OFF. 1) Replace the PCB after elapsing 3 minutes from power OFF. 1) Replace the PCB after elapsing 3 minutes from power OFF. (Be sure to measure voltage (DC) between T26 and T27 on inverter PCB, and check that the (Be sure to measure voltage (DC) between T26 and T27 on inverter PCB, and check that the (Be sure to measure voltage (DC) between T26 and T27 on inverter PCB, and check that the...
Page 55 '22 • PAC-SM-426 PCA012D043 (ii) Models FDC100VNX-W, 125VNX-W, 140VNX-W PCA012D043 Model FDC100VSX-W, 125VSX-W, 140VSX-W Replace the PCB after elapsing 3 minutes from power OFF. (Be sure to measure voltage (DC) on both capacitor terminals located in control back, and check that the voltage is discharged sufficiently.) Disconnect the connectors from the control PCB.
Page 56 '22 • PAC-SM-426 (iii) Models FDC100VNA-W, 125VNA-W, 140VNA-W PCA012D083 1) Disassembly a) After the breaker is shut down, remove the service panel, top panel and rear panel. (Refer to Fig.1). b) Don't touch the main PCB until three minutes have passed after the breaker is shut doun. (After having shut down the breaker, some capacitor is held by high voltage.
Page 57 '22 • PAC-SM-426 LED2(Red) LED1(Green)
Page 58 '22 • PAC-SM-426 2) Exchange a) Match the setting of new main PCB switches (JSW1, SW3-7) with former main PCB. (Refer to Fig.4) b) Tum over the separator of new heat conduction sheet and paste the heat conduction sheet on the aluminum block.
Page 59 '22 • PAC-SM-426...
Page 60 '22 • PAC-SM-426 (iv) Models FDC100VSA-W, 125VSA-W, 140VSA-W PCA012D084 1) Disassembly a) After the breaker is shut down, remove the service panel, top panel and rear panel. (Refer to Fig.1). b) Don't touch the main PCB until three minutes have passed after the breaker is shut doun. (After having shut down the breaker, some capacitor is held by high voltage.
Page 61 '22 • PAC-SM-426 LED2(Red) LED1(Green)
Page 62 '22 • PAC-SM-426 2) Exchange a) Match the setting of new main PCB switches (JSW1, SW3-7) with former main PCB. (Refer to Fig.4) b) Tum over the separator of new heat conduction sheet and paste the heat conduction sheet on the aluminum block. (Refer to Fig.5.) 3) Installation a) Install the new main PCB on the control and tighten the screw as shown in Fig.6.
Page 63 '22 • PAC-SM-426...
Page 64 '22 • PAC-SM-426 (v) Models FDC200, 250, 280VSA-W PCA012D110 Exchange the control PCB according to the following procedure. 1. Exchange the PCB after elapsing 3 minutes from power OFF. 2. Measurement was done on both ends of connector (CNA1) during measurement, the voltage (DC) might charged the electrolytic capacitor, be sure that the voltage is discharged sufficiently (10V of less).
Page 65 '22 • PAC-SM-426 (vi) Model FDC71VNP-W 1)Shut down a power source. 2)Remove a top panel.(Fig.1　①） 3)Detach a service panel.（Fig.1　②） 4)Detach a top panel of control box.（Fig.1　③） ③ ① ② Fig.1 Outdoor unit 5)Make sure that 3 minutes are elasped after shutting down a power source. 6)Check a voltage with the temrinal of C58 by multimeter.
Page 66 '22 • PAC-SM-426 9)Disconect the cable of terminal block and fuse.(Fig.4　⑦、⑧） 10)Disconnect the cables of reactor.（Fig.4　⑨） ⑦ ⑧ ⑨ Fig.4 Cable of fuse, terminal block and reactor 11)Disconnect 2 earth calbes on right side of control box.（Fig.5　⑩、⑪） ⑩ ⑪ Fig.5 Earth cable of control box 12)Disconnect CnTH(Black) on control PCB.
Page 67 '22 • PAC-SM-426 15)Make sure setting of jumper on new PCB is the same with old PCB's setting. (Fig.8) Fig.8 Setting of jumper on PCB 16)Connect the cables and connectors with the control PCB. (Confirm the connectors are not half inserted.)
Page 68 '22 • PAC-SM-426 (vii) Models FDC90, 100VNP-W 1)Shut down a power source. 2)Remove a top panel.(Fig.1　①） 3)Detach a service panel.（Fig.1　②） 4)Detach a top panel of control box. ① ② Fig.1 Outdoor unit 5)Make sure that 3 minutes are elasped after shutting down a power source. 6)Check a voltage with the temrinal of C58 by multimeter.
Page 69 '22 • PAC-SM-426 9)Disconect the cable of terminal block and fuse.(Fig.4　⑦、⑧） 10)Disconnect the cables of reactor.（Fig.4　⑨） ⑦ ⑧ ⑨ Fig.4 Cable of fuse, terminal block and reactor 11)Disconnect 2 earth calbes on right side of control box.（Fig.5　⑩、⑪） ⑩ ⑪ Fig.5 Earth cable of control box 12)Disconnect CnTH(Black) on control PCB.
Page 70 '22 • PAC-SM-426 15)Make sure setting of jumper on new PCB is the same with old PCB's setting. (Fig.8) Fig.8 Setting of jumper on PCB 16)Connect the cables and connectors with the control PCB. (Confirm the connectors are not half inserted.)
Page 71 '22 • PAC-SM-426 (c) Outdoor inverter PCB replacement procedure (c) Outdoor inverter PCB replacement procedure Precautions for Safety Precautions for Safety • Since the following precaution is the important contents for safety, be sure to observe them. • Since the following precaution is the important contents for safety, be sure to observe them. WARNING and CAUTION are described as follows: WARNING and CAUTION are described as follows: WARNING...
Page 72 '22 • PAC-SM-426 Inverter PCB Power source for inverter PCB ：Between T26 and T27 Check that the voltage is discharged sufficiently. After elapsing 3 minutes from power OFF Presence and shape of electric component may vary according to model. Fig.2 Voltage measurement points Remove the harness bands from control unit after Presence and shape of electric component removing the harnesses from harness bands.
Page 73 '22 • PAC-SM-426 (ii) Models FDC100VNX-W, 125VNX-W, 140VNX-W PCA012D025D Replace the PCB after elapsing 3 minutes from power OFF. (Be sure to measure voltage (DC) on both capacitor terminals located in control back, and check that the voltage is discharged sufficiently.(Refer to Fig.1.)) Take off the connection of inverter PCB terminal block connector and remove the screw of power transistor then remove the PCB. Wipe off the silicon grease neatly on the control’s radiation heat fins.
Page 74 '22 • PAC-SM-426 PCA012D025F (iii) Models FDC100VSX-W, 125VSX-W, 140VSX-W Replace the PCB after elapsing 3 minutes from power OFF. (Be sure to measure voltage (DC) on both capacitor terminals located in control back, and check that the voltage is discharged sufficiently.(Refer to Fig.1.)) Take off the connection of inverter PCB terminal block connector and remove the screw of power transistor then remove the PCB. Wipe off the silicon grease neatly on the control’s radiation heat fins.
Page 75 '22 • PAC-SM-426 PCB012D057A (V) Model FDC250VSA (iv) Models FDC200, 250, 280VSA-W Replace the inverter PCB (Fig.1) according to the following procedure. 1) Replace the PCB after elapsing 3 minutes from power OFF. In the situation that harnesses are connected to control PCB, be sure to measure voltage (DC) of two places ((A), (B)) and check that the voltage is discharged sufficiently.
Page 76 '22 • PAC-SM-426 ※：Presence and shape of electric component may vary according to a model. Remove screws. (4 places) (C) Voltage measurement point of power source for inverter : DM (+) – DM (–) Inverter PCB Snubber capacitor Control PCB Remove harnesses from bands.
Page 77 SW7-3 Reserved Keep OFF Reserved Keep OFF SW8-1 Reserved Keep OFF SW8-2 SW8-3 Reserved Keep OFF '22 • PAC-SM-426 Pump down operation Normal*/Pump down Normal * Default setting (b) Models FDC100, 125, 140VNX, 100, 125, 140VSX DIP switch setting list (Outdoor unit) Switch Description Default setting...
Page 78 '22 • PAC-SM-426 DIP switch setting list (Outdoor unit) Models FDC100, 125, 140VNX-W, 100, 125, 140VSX-W DIP switch setting list (Outdoor unit) (1) Control PCB Models FDC100, 125, 140VNX-W, 100, 125, 140VSX-W (1) Control PCB (1) Control PCB Description Default setting Switch Remark Pump down operation...
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Page 81 '22 • PAC-SM-426 (5) Check of anomalous operation data with the remote control (a) In case of RC-EX3A remote control [Operating procedure] On the TOP screen, touch the buttons in the order of “Menu” “Service setting” “Service & Maintenance” ① → → →...
Page 82 '22 • PAC-SM-426 Number 33 details of compressor protection status Models FDC100, 125, 140VNX-W, 100, 125, 140VSX-W Number 33 details of compressor protection status Models FDC100, 125, 140VNX-W, 100, 125, 140VSX-W Models FDC100, 125, 140VNX-W, 100, 125, 140VSX-W Reference page Contents of display Notes(1) Operation data display on the remote control.
Page 83 '22 • PAC-SM-426 (b) In case of RC-E5 remote control Number Data Item Operation data can be checked with remote control unit operation. (Operation Mode) (Set Temperature) ➀ Press the button. (Return Air Temperature) The display change “ ” (Remote Control Temperature Sensor) ➁...
Page 84 '22 • PAC-SM-426 (6) Power transistor module (Including the driver PCB) inspection procedure Is the power transistor module cracked or burnt? Is there a short circuit between the power transistor module ∗ terminals? Compressor operation Is there any difference in the compressor current If there is a 10% or greater difference between phases?
Page 85 '22 • PAC-SM-426 Models FDC100-140VNX-W, 100-140VSX-W Models FDC200, 250, 280VSA-W Tester Normal value (W) Tester Normal value (W) Terminal Terminal FDC100- FDC100- Terminal Terminal Models FDC200, 140VNX-W 140VSX-W 250, 280 Approx. 230 k Approx. 50 k Scores of M Approx. 570 k Approx.
Page 86 '22 • PAC-SM-426 (7) Inverter checker for diagnosis of inverter output Models FDC71, 100, 125, 140VNX-W,100, 125, 140VSX-W FDC100, 125, 140VNA-W,100, 125, 140VSA-W,200, 250, 280VSA-W, FDC71, 90, 100VNP-W 　●Checking method (a) Models FDC71-280 (i) Setup procedure of checker. 1) Power OFF (Turn off the breaker). 2) Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor.
Page 87 '22 • PAC-SM-426 (b) Models FDC71-100VNP-W (c) Models FDC71, 90VNP (i) Setup procedure of checker. 1) Power OFF (Turn off the breaker). 2) Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor. 3) Connect the wires U (Red) , V (White) and W (Black) of checker to the terminal of disconnected wires (U, V, W) from compressor respectively.
Page 88 '22 • PAC-SM-426 (8) Outdoor unit control failure diagnosis circuit diagram Model FDC71VNX-W...
Page 89 '22 • PAC-SM-426 Models FDC100VNX-W, 125VNX-W, 140VNX-W t° t° t° t° t° t°...
Page 90 '22 • PAC-SM-426 Models FDC100VSX-W, 125VSX-W, 140VSX-W t° t° t° t° t° t°...
Page 91 '19 • PAC-SM-309 '22 • PAC-SM-426 (7) Outdoor unit control failure diagnosis circuit diagram Models FDC100, 125, 140VNA-W...
Page 92 '22 • PAC-SM-426 Models FDC100, 125, 140VSA-W...
Page 93 '22 • PAC-SM-426 Models FDC200, 250, 280VSA-W...
Page 94 '22 • PAC-SM-426 Models FDC71, 90, 100VNP-W...
Page 95 '22 • PAC-SM-426 1.2.2 Troubleshooting flow (1) List of troubles Models FDC71, 100, 125, 140VNX-W, 100, 125, 140VSX-W FDC100, 125, 140VNA-W, 100, 125, 140VSA-W Remote control display Description of trouble Reference page None Operates but does not cool. None Operates but does not heat. None Earth leakage breaker activated None...
Page 96 '22 • PAC-SM-426 Models FDC200, 250, 280VSA-W Remote control display Description of trouble Reference page None Operates but does not cool. None Operates but does not heat. 99 · 100 None Earth leakage breaker activated None Excessive noise/vibration (1/3) None Excessive noise/vibration (2/3) None Excessive noise/vibration (3/3)
Page 97 '22 • PAC-SM-426 Models FDC71, 90, 100VNP-W Remote control display Description of trouble Reference page None Operates but does not cool. None Operates but does not heat. None Earth leakage breaker activated None Excessive noise/vibration (1/3) None Excessive noise/vibration (2/3) None Excessive noise/vibration (3/3) None...
Page 98 '22 • PAC-SM-426 (2) Troubleshooting Green Error code Content Keeps flashing Stays OFF Indoor None Remote control: Operates but does not cool. Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature difference between return and supply air.
Page 99 '22 • PAC-SM-426 Green Operates but does not heat. Content Error code Keeps flashing Stays OFF Indoor None Remote control: (Except for models FDC200-280VSA-W) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model Except for models Diagnosis Countermeasure FDC200-280VSA-W Check the indoor fan operation.
Page 100 '22 • PAC-SM-426 Green Operates but does not heat. (1/2) Content Error code Keeps flashing Stays OFF Indoor None Remote control: (Models FDC200-280VSA-W only) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure ・ Is there any fouling, clogging on indoor and outdoor heat exchanger? ・...
Page 101 '22 • PAC-SM-426 Green Operates but does not heat. (2/2) Content Error code Keeps flashing Stays OFF Indoor None Remote control: (Models FDC200-280VSA-W only) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure From previous page Is there any problem with the coil of SV1 function? Is the coil removed from the body of SV1?
Page 102 '22 • PAC-SM-426 Green Content Error code Stays OFF Stays OFF Indoor None Earth leakage breaker activated Remote control: Stays OFF Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are OK the insulation resistance and Replace compressor. resistance between terminals compressor? (1)See pages 145 and 147.
Page 103 '22 • PAC-SM-426 Green Content Error code – – Indoor None Excessive noise/vibration (1/3) Remote control: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If excessive noise/vibration persists when sufficient Does time has elapsed after noise/vibration stopping the unit, it is occur during or soon after stopping operation...
Page 104 '22 • PAC-SM-426 Green Content Error code – – Indoor None Excessive noise/vibration (2/3) Remote control: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Rearrange the piping to Are the pipes avoid contact with the contacting the casing.
Page 105 '22 • PAC-SM-426 Green Content Error code – – Indoor None Excessive noise/vibration (3/3) Remote control: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page If insufficient cooling/ 〔 Adjustment heating problem happens during commissioning 〕 due to anomalous operating Does noise/vibration occur when the conditions at cooling/...
Page 106 '22 • PAC-SM-426 Green Content Error code Louver motor failure Keeps flashing Stays OFF Indoor None Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure ▲ Check at the indoor unit side. Operate after waiting for more than 1 minute.
Page 107 '22 • PAC-SM-426 Green Error code Content Power source system error Indoor Stays OFF Stays OFF Remote control: None (Power source to indoor unit control PCB) Outdoor Keeps flashing 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC220/240V detected between on the terminal block...
Page 108 '22 • PAC-SM-426 Power source system error Green Content Error code (Power source to remote control) Keeps flashing 3-time flash None Indoor Remote control: (Except for models FDC71-100VNP-W) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model Except for models Diagnosis Countermeasure FDC71-100VNP-W...
Page 109 '22 • PAC-SM-426 Power source system error Green Content Error code (Power source to remote control) None Remote control: Keeps flashing 3-time flash Indoor (Models FDC71-100VNP-W only) 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure Is there any Correct it. loose connection of remote control wires? 2.
Page 110 '22 • PAC-SM-426 Green Content Error code INSPECT I/U Keeps flashing Stays OFF Indoor INSPECT I/U Remote control: (When 1 or 2 remote controls are connected) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are 2 units of remote control connected?
Page 111 '22 • PAC-SM-426 Green Content Error code INSPECT I/U Keeps flashing Stays OFF INSPECT I/U Indoor Remote control: (Connection of 3 units or more remote controls) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are more than Reduce to 2 units or less.
Page 112 '22 • PAC-SM-426 Green Content Communication error at Error code Keeps flashing Stays OFF Indoor Remote control: WAIT initial operation (1/3) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model Models FDC71-140VNX-W, Diagnosis Countermeasure 100-140VSX-W, 100-140VN(S)A-W WAIT “ ” is still displayed on the remote control LED 2 minutes after power ON.
Page 113 '22 • PAC-SM-426 Green Content Communication error at Error code Keeps flashing Stays OFF Indoor Remote control: WAIT initial operation (2/3) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model Models FDC71-140VNX-W, Diagnosis Countermeasure 100-140VSX-W, 100-140VN(S)A-W Diagnosis for when the outdoor unit control PCB LED is turned off Shut down the breaker and back on again the breaker 3 minutes later.
Page 114 '22 • PAC-SM-426 Green Communication error at Content Error code Keeps flashing Stays OFF Indoor Remote control: initial operation (3/3) WAIT Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model Models FDC71-140VNX-W, Diagnosis Countermeasure 100-140VSX-W, 100-140VN(S)A-W Method to check for inverter PCB before replacement of blown power source fuse.
Page 115 '22 • PAC-SM-426 Communication error at Green Content Error code initial operation (1/2) Keeps flashing Stays OFF Indoor Remote control: WAIT (Models FDC200-280VSA-W only) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure WAIT “ ”...
Page 116 '22 • PAC-SM-426 Communication error at Green Content Error code initial operation (2/2) Keeps flashing Stays OFF Indoor Remote control: WAIT (Models FDC200-280VSA-W only) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure Diagnosis for when the outdoor unit control PCB LED is turned off From previous Shut down the breaker and back on...
Page 117 '22 • PAC-SM-426 Communication error at Green Error code Content initial operation (1/3) Remote control: WAIT Indoor Keeps flashing Stays OFF (Models FDC71-100VNP-W only) 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure When the remote control LCD displays “ ”...
Page 118 '22 • PAC-SM-426 Communication error at Green Error code Content initial operation (2/3) Remote control: WAIT Indoor Keeps flashing Stays OFF (Models FDC71-100VNP-W only) 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure When the fuse is blown, the method to inspect outdoor unit PCB before replacing the power From previous page source fuse...
Page 119 '22 • PAC-SM-426 Communication error at Green Error code Content initial operation (3/3) Remote control: WAIT Indoor Keeps flashing Stays OFF (Models FDC71-100VNP-W only) 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure When the remote control display is extinguished after the Remote control display is power on extinguished after the power on.
Page 120 '22 • PAC-SM-426 Green No display Content Error code Stays OFF Stays OFF Indoor None Remote control: (Except for models FDC71-100VNP-W) Stays OFF Stays OFF Outdoor 5. Troubleshooting 1. Applicable model Except for models Diagnosis Countermeasure FDC71-100VNP-W Remote control does not display anything after the power on.
Page 121 '22 • PAC-SM-426 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: communication circuit error Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is it possible to Malfunction by noise reset normally by the Check peripheral power reset?
Page 122 '22 • PAC-SM-426 Green Content Error code Keeps flashing 2-time flash Indoor Communication error during operation Remote control: Keeps flashing See below Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure ● In case that the outdoor unit red LED flashes 2-time Note (1) Inspect faulty connections (disconnection, looseness) on the outdoor unit terminal block.
Page 123 '22 • PAC-SM-426 Green Content Error code Indoor heat exchanger Keeps flashing 1-time flash Indoor Remote control: temperature sensor anomaly Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of indoor heat Correct it.
Page 124 '22 • PAC-SM-426 Green Content Error code Return air temperature Keeps flashing 1-time flash Indoor Remote control: sensor anomaly Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of return Correct it. ➞ Connect air temperature sensor connector.
Page 125 '22 • PAC-SM-426 Green Content Error code Keeps flashing 1-time flash Indoor Heating overload operation Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the air filter clogged? Wash. 2. Error detection method Is the indoor heat exchanger Defective indoor heat...
Page 126 '22 • PAC-SM-426 Excessive number of connected Green Content Error code indoor units (more than 17 units) Keeps flashing Stays OFF Indoor Remote control: by controlling with one remote control Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 127 '22 • PAC-SM-426 Green Content Error code Address setting error of Keeps flashing Stays OFF Indoor Remote control: indoor units Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E11 occurs Is “Master IU address set” function of remote 2.
Page 128 '22 • PAC-SM-426 Green Content Error code Communication error Keeps flashing 3-time flash Indoor Remote control: between master and slave indoor units Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model Models FDC140VN(S)X-W, Diagnosis Countermeasure 140VN(S)A-W, 200-280VSA-W Is it OK the unit Correct unit address setting.
Page 129 '22 • PAC-SM-426 Green Content Error code Indoor fan motor anomaly Keeps flashing 1-time flash Indoor Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material Remove foreign material. intervene in rotational area of fan propeller? Does the fan 2.
Page 130 '22 • PAC-SM-426 Green Content Error code Address setting error of Keeps flashing 1-time flash Indoor Remote control: master and slave indoor units Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model Models FDC140VN(S)X-W, Diagnosis Countermeasure 140VN(S)A-W, 200-280VSA-W E18 occurs Is “Master IU address set”...
Page 131 '22 • PAC-SM-426 Green Content Error code Operation mode setting error Keeps flashing 1-time flash Indoor Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON Is SW7-1 Defective indoor unit on the indoor unit control control PCB (Defective...
Page 132 '22 • PAC-SM-426 Green Content Indoor fan motor rotation Error code Keeps flashing 1-time flash Indoor Remote control: speed anomaly Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material Remove foreign material. intervene in rotational area of fan propeller? Does the fan...
Page 133 '22 • PAC-SM-426 Green Content Error code Refrigerant leak detection Keeps flashing 1-time flash Indoor Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the refrigerant Repair the refrigerant actually leaking? leakage point. ➞ Replace refrigerant sensor.
Page 134 '22 • PAC-SM-426 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: temperature sensor anomaly Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the remote Correct connector. control temperature sensor connected properly? 2.
Page 135 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Cooling overload operation Remote control: Outdoor control PCB Keeps flashing 1-time flash (Except for models FDC71-100VNP-W) Yellow LED Outdoor inverter Keeps flashing 5. Troubleshooting 1. Applicable model Except for models Diagnosis Countermeasure...
Page 136 '22 • PAC-SM-426 Green Error code Content Cooling overload operation Remote control: (Models FDC71-100VNP-W only) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure * For the characteristics of outdoor heat exchanger temperature sensor, refer to E37. the characteristics of Replace outdoor heat outdoor heat exchanger...
Page 137 '22 • PAC-SM-426 Green Discharge pipe Error code Content Indoor control PCB Keeps flashing Stays OFF Remote control: temperature error Outdoor control PCB Keeps flashing 1-time flash (Except for models FDC200-280VSA-W) Yellow LED Outdoor inverter Keeps flashing 5. Troubleshooting 1. Applicable model Except for models Diagnosis Countermeasure...
Page 138 '22 • PAC-SM-426 Green Discharge pipe Error code Content Indoor control PCB Keeps flashing Stays OFF temperature error Remote control: Outdoor control PCB Keeps flashing 1-time flash (Models FDC200-280VSA-W only) Yellow LED Outdoor inverter Keeps flashing 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure Models FDC200-280VSA-W...
Page 139 '22 • PAC-SM-426 Green Outdoor heat Error code Content Indoor control PCB Keeps flashing Stays OFF exchanger temperature Remote control: Outdoor control PCB Keeps flashing 1-time flash sensor anomaly Yellow LED Outdoor inverter Keeps flashing 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 140 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Outdoor air temperature Remote control: Outdoor control PCB Keeps flashing 1-time flash sensor anomaly Yellow LED Outdoor inverter Keeps flashing 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the outdoor air...
Page 141 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Discharge pipe temperature Remote control: Outdoor control PCB Keeps flashing 1-time flash sensor anomaly Yellow LED Outdoor inverter Keeps flashing 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure All models Is the...
Page 142 '22 • PAC-SM-426 Green Error code Content High pressure error Indoor control PCB Keeps flashing Stays OFF Remote control: (63H1 activated) Outdoor control PCB Keeps flashing 1-time flash Yellow LED (Except for models FDC71-100VNP-W) Outdoor inverter Keeps flashing 5. Troubleshooting 1.
Page 143 '22 • PAC-SM-426 Green Error code Content Service valve (gas side) closing operation Remote control: (Models FDC71-100VNP-W only) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure Models FDC71-100VNP-W Are the Open the service valve. service valve (gas side) opened? 2.
Page 144 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Power transistor overheat Remote control: Outdoor control PCB Keeps flashing 1-time flash (Models FDC71-140VNX-W, 100-140VSX-W only) Yellow LED Outdoor inverter 6-time flash 5. Troubleshooting 1. Applicable model Models FDC71-140VNX-W, Diagnosis Countermeasure...
Page 145 '22 • PAC-SM-426 RUN light TIMER light Indoor display Error code Content – – Green LED Red LED Power transistor overheat Outdoor unit Remote control: control PCB Keeps flashing 1-time flash (Models FDC200-280VSA-W only) Yellow LED Outdoor unit inverter PCB Keeps flashing 5.
Page 146 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Current cut (1/2) Remote control: Outdoor control PCB Keeps flashing 1-time flash (Except for models FDC200-280VSA-W) Yellow LED Outdoor inverter 1-time flash 5. Troubleshooting 1. Applicable model Except for models Diagnosis Countermeasure...
Page 147 '22 • PAC-SM-426 Green Error code Content Indoor Keeps flashing Stays OFF Current cut (2/2) Remote control: Outdoor control PCB Keeps flashing 1-time flash (Except for models FDC200-280VSA-W) Yellow LED Outdoor inverter 1-time flash 5. Troubleshooting 1. Applicable model Except for models Diagnosis Countermeasure FDC200-280VSA-W...
Page 148 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Current cut (1/2) Remote control: Outdoor control PCB Keeps flashing 1-time flash (Models FDC200-280VSA-W only) Yellow LED Outdoor inverter 9-time flash 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure...
Page 149 '22 • PAC-SM-426 Green Error code Content Indoor Keeps flashing Stays OFF Current cut (2/2) Remote control: Outdoor control PCB Keeps flashing 1-time flash (Models FDC200-280VSA-W only) Yellow LED Outdoor inverter 9-time flash 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure From previous page...
Page 150 '22 • PAC-SM-426 Green Liquid back error Error code Content Indoor control PCB Keeps flashing Stays OFF Remote control: (Cooling mode) Outdoor control PCB Keeps flashing 1-time flash Yellow LED (Models FDC200-280VSA-W only) Outdoor inverter Keeps flashing 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure...
Page 151 '22 • PAC-SM-426 Green Liquid back error Error code Content Indoor control PCB Keeps flashing Stays OFF (Heating mode) Remote control: Outdoor control PCB Keeps flashing 1-time flash (Models FDC200-280VSA-W only) Yellow LED Outdoor inverter Keeps flashing 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure Models FDC200-280VSA-W...
Page 152 '22 • PAC-SM-426 Green Communication error between Error code Content Indoor control PCB Keeps flashing Stays OFF Remote control: inverter PCB and outdoor unit control PCB Outdoor control PCB Keeps flashing 1-time flash Yellow LED (Models FDC71-140VNX-W, 100-140VSX-W only) Outdoor inverter Keeps flashing 5.
Page 153 '22 • PAC-SM-426 Green Communication error between Error code Content Indoor control PCB Keeps flashing Stays OFF inverter PCB and outdoor unit control PCB Remote control: Outdoor control PCB Keeps flashing 1-time flash Yellow LED (Models FDC200-280VSA-W only) Outdoor inverter Keeps flashing 5.
Page 154 '22 • PAC-SM-426 Green Error code Content Indoor Keeps flashing Stays off Inverter PCB A/F module anomaly Remote control: Outdoor control PCB Keeps flashing 1-time flash (Model FDC71VNX-W only) Yellow LED Outdoor inverter 7-time flashing 5. Troubleshooting 1. Applicable model Model FDC71VNX-W Diagnosis Countermeasure...
Page 155 '22 • PAC-SM-426 Green Content Error code PCB A/F module anomaly Remote control: Indoor unit Keeps flashing Stays OFF control PCB (Models FDC100-140VNA-W only) Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure Models FDC Is the power s ource...
Page 156 '22 • PAC-SM-426 Green Error code Content Active filter voltage error Remote control: (Models FDC71-100VNP-W only) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure Restore normal condition. Is the power source normal? 2. Error detection method Is voltage Restore normal condition.
Page 157 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Remote control: Outdoor control PCB Keeps flashing 1-time flash Outdoor fan motor anomaly Yellow LED Outdoor inverter Keeps flashing 5. Troubleshooting 1. Applicable model Models FDC71-140VNX-W, Diagnosis Countermeasure 100-140VSX-W,...
Page 158 '22 • PAC-SM-426 Green Error code Content Outdoor fan motor anomaly Remote control: Indoor unit Keeps flashing Stays OFF control PCB (Models FDC100-140VN(S)A-W only) Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model Models FDC100-140 Diagnosis Countermeasure VN(S)A-W Does any foreign...
Page 159 '22 • PAC-SM-426 Green Error code Content Outdoor fan motor anomaly Remote control: (Models FDC71-100VNP-W only) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure Does any foreign material intervene Remove foreign matter. in rotational area of fan propeller? Does the 2.
Page 160 '22 • PAC-SM-426 Green Error code Content Low pressure error or Indoor control PCB Keeps flashing Stays OFF Remote control: low pressure sensor anomaly (1/2) Outdoor control PCB Keeps flashing 1-time flash (Except for models FDC71-100VNP-W) Yellow LED Outdoor inverter Keeps flashing 5.
Page 161 '22 • PAC-SM-426 Green Content Error code Low pressure error or Indoor control PCB Keeps flashing Stays OFF Remote control: low pressure sensor anomaly (2/2) Keeps flashing 1-time flash Outdoor control PCB (Except for models FDC71-100VNP-W) Yellow LED Outdoor inverter Keeps flashing 5.
Page 162 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Remote control: Inverter and fan motor anomaly Outdoor control PCB Keeps flashing 1-time flash Yellow LED Outdoor inverter 6-time flash 5. Troubleshooting 1. Applicable model Models FDC71-140VNX-W, Diagnosis Countermeasure 100-140VSX-W,...
Page 163 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Inverter or power transistor anomaly Remote control: Outdoor control PCB Keeps flashing 1-time flash Yellow LED (Models FDC200-280VSA-W only) Outdoor inverter 8-time flash 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure...
Page 164 '22 • PAC-SM-426 Green Green Error code Error code Content Content Power transistor anomaly Remote controller: E51 Remote control: Power transistor error Keeps flashing Stays Off Indoor Indoor Keeps flashing Stays OFF (Models FDC71-100VNP-W only) 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure...
Page 165 '22 • PAC-SM-426 Green Suction pipe Error code Content Indoor control PCB Keeps flashing Stays OFF temperature sensor anomaly Remote control: Outdoor control PCB Keeps flashing 1-time flash Yellow LED (Except for models FDC71-100VNP-W) Outdoor inverter Keeps flashing 5. Troubleshooting 1.
Page 166 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Low pressure sensor anomaly Remote control: Outdoor control PCB Keeps flashing 1-time flash (Except for models FDC71-100VNP-W) Yellow LED Outdoor inverter Keeps flashing 5. Troubleshooting 1. Applicable model Except for models Diagnosis Countermeasure...
Page 167 '22 • PAC-SM-426 Green Compressor under-dome Error code Content Indoor control PCB Keeps flashing Stays OFF Remote control: temperature sensor anomaly Outdoor control PCB Keeps flashing 1-time flash (Models FDC200-280VSA-W only) Yellow LED Outdoor inverter Keep flashing 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure...
Page 168 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Insufficient refrigerant amount Remote control: Outdoor control PCB Keeps flashing 1-time flash or detection of service valve closure Yellow LED Outdoor inverter (Except for models FDC71-100VNP-W) Keeps flashing 5.
Page 169 '22 • PAC-SM-426 Insufficient refrigerant amount Green Error code Content or detection of service valve closure Remote control: (Models FDC71-100VNP-W only) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure Is the Open fully. service valve fully opened? Are the connections of indoor...
Page 170 '22 • PAC-SM-426 Anomalous compressor Green Error code Content by loss of synchronism Stays OFF Indoor Remote control: E58 (Models FDC100-140VN(S)A-W only) 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Models FDC100-140VN(S)A-W Diagnosis Countermeasure Check, record operating Save data for 30 minutes before stopping in Mente PC condition.
Page 171 '22 • PAC-SM-426 Green Green Current safe stop Error code Content Content Error code Current safe stop Keeps flashing Stays Off Indoor Remote control: Remote controller: E58 (Models FDC71-100VNP-W only) Indoor Keeps flashing Stays OFF (Model SRC40 - 60) Outdoor 3 time flash ―...
Page 172 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Compressor startup failure (1/2) Remote control: Outdoor control PCB Keeps flashing 5-time flash (Models FDC71-140VNX-W, 100-140VSX-W only) Yellow LED Outdoor inverter Stays OFF 5. Troubleshooting 1. Applicable model Models FDC71-140VNX-W, Diagnosis Countermeasure...
Page 173 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Compressor startup failure (2/2) Remote control: Outdoor control PCB Keeps flashing 5-time flash (Models FDC71-140VNX-W, 100-140VSX-W only) Yellow LED Outdoor inverter Stays OFF 5. Troubleshooting 1. Applicable model Models FDC71-140VNX-W, Diagnosis Countermeasure...
Page 174 '22 • PAC-SM-426 Green Error code Content Compressor startup failure (1/2) Remote control: Indoor unit Keeps flashing Stays OFF control PCB (Models FDC100-140VN(S)A-W only) Outdoor unit Keeps flashing 5-time flash control PCB 5. Troubleshooting 1. Applicable model Models FDC100-140VN(S) Diagnosis Countermeasure In case that the compressor does not start at all and no...
Page 175 '22 • PAC-SM-426 Green Error code Content Compressor startup failure (2/2) Remote control: Indoor unit Keeps flashing Stays OFF control PCB (Models FDC100-140VN(S)A-W only) Outdoor unit Keeps flashing 5-time flash control PCB 5. Troubleshooting 1. Applicable model Models FDC100-140 Diagnosis Countermeasure VN(S)A-W From previous page...
Page 176 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Compressor startup failure (1/2) Remote control: Outdoor control PCB Keeps flashing 5-time flash (Models FDC200-280VSA-W only) Yellow LED Outdoor inverter 4-time flash 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure...
Page 177 '22 • PAC-SM-426 Green Error code Content Indoor control PCB Keeps flashing Stays OFF Remote control: Compressor startup failure (2/2) Outdoor control PCB Keeps flashing 5-time flash (Models FDC200-280VSA-W only) Yellow LED Outdoor inverter 4-time flash 5. Troubleshooting 1. Applicable model Models FDC200-280VSA-W Diagnosis Countermeasure...
Page 178 '22 • PAC-SM-426 Green Compressor startup failure Content Error code Remote control: (Models FDC71-100VNP-W only) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure Disconnect the outdoor fan motor Compressor does not start at all. connector and try to startup.
Page 179 '22 • PAC-SM-426 Green Compressor rotor lock error Error code Content Remote control: (Models FDC71-100VNP-W only) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model Models FDC71-100VNP-W Diagnosis Countermeasure Is the Check and correct the power source voltage power source voltage. Reset the power source and restart operation.
Page 180 '22 • PAC-SM-426 Green Content Error code Refrigerant sensor failure Stays OFF Keeps flashing Indoor The refrigerant Remote control: sensor is faulty. － Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is there Wiring modification ➞ a mistake in the wiring? Replace refrigerant sensor.
Page 181 '22 • PAC-SM-426 Green Content Error code Refrigerant sensor disconnection Stays OFF Stays OFF Indoor The refrigerant sensor Remote control: is disconnected. － Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is it OK to connect the refrigerant Insert connector securely.
Page 182 '22 • PAC-SM-426 1.3 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. ● When disassembling, be sure to turn oﬀ the power. When disassembling the electrical components, check the electrical wiring diagram. ●...
Page 183 '22 • PAC-SM-426 ① ① ③ ② ② ③ 9. To remove the heat exchanger assembly (1) Remove the center panel assembly.(See No.6.) (2) Remove 8 top panel ﬁxing screws and remove it.( mark) ○ (3) Remove 2 support ﬁxing screws and remove it.( □ mark) (4) Remove 4 heat exchanger assy ﬁxing screws and remove it.( ←...
Page 184 '22 • PAC-SM-426 (2) Outdoor units PCA012D087 1. To remove the service panel (1) Remove 5 service panel ﬁxing screws and remove it. 2. To remove the fan motor (FM) (1) Remove the service panel.(See No.1.) (2) Disconnect the motor connector(FMxx) on PCB in control box. (3) Remove 4 fan guard ews and remove it.( mark)
Page 185 '22 • PAC-SM-426 9. To remove the compressor (CM) (1) Remove the service panel.(See No.1.) (2) Remove the insula which covers compressors. (Strings (a)-(d) should be loosen.) (3) Remove 3 terminal cover ﬁxing bolts( mark) and remove it and disconnect the power wiring. (4) Remove welded part of compressor by welding.
Page 186 '22 • PAC-SM-426 1.4 ELECTRICAL WIRING (1) Indoor units Models FDF71VH, 100VH, 125VH, 140VH PGA000Z843...
Page 187 '22 • PAC-SM-426 (2) Outdoor units Model FDC71VNX-W PCA001Z880...
Page 188 '22 • PAC-SM-426 Models FDC100VNX-W, 125VNX-W, 140VNX-W PCA001Z886...
Page 189 '22 • PAC-SM-426 Models FDC100VSX-W, 125VSX-W, 140VSX-W PCA001Z887...
Page 190 Electronic Service valve expansion valve Flare connecting (Flare connecting) (EEV) Capillary tube Liquid line '22 • PAC-SM-426 Strainer Muffler 1.5 PIPING SYSTEM (1) Single type Models FDT71, 100, 125, 140 Models 71, 100, 125, 140 Indoor unit Outdoor unit Cooling cycle Heating cycle Check joint 4-way valve...
Page 191 '22 • PAC-SM-426 Preset point of the protective devices Equipped 100, 125, 140 model Parts name Mark unit Temperature sensor Active 63℃ Thi-R (for protection Indoor unit Inactive 56℃ overloading in heating) Temperature sensor Active 1.0℃ Thi-R Indoor unit (for frost prevention) Inactive 10℃...
Page 192: Table Of Contents
'22 • PAC-SM-426 2. MICRO INVERTER PACKAGED AIR-CONDITIONERS CONTENTS 2.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ..192 ............192 2.1.1 Remote control (Option parts) .....192 2.1.2 Operation control function by the wired remote control ......192 2.1.3 Operation control function by the indoor control ......192 2.1.4 Operation control function by the outdoor control (Ⅰ) Models FDC100－140VNA-W, 100－140VSA-W ......192...
Page 193: Outline Of Operation Control By Microcomputer
'22 • PAC-SM-426 2.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 2.1.1 Remote control (Option parts) ………………………………………… See page 4. 2.1.2 Operation control function by the wired remote control ………… See page 7. 2.1.3 Operation control function by the indoor control …………………See page 10. 2.1.4 Operation control function by the outdoor control ( I ) Models FDC100-140VNA-W, 100-140VSA-W (1) Determination of compressor speed...
Page 194: Compressor Start Control
'22 • PAC-SM-426 (2) Compressor start control (a) Compressor starts upon receipt of the thermostat ON signal from the indoor unit. (b) However, at initial start after turning the power source breaker, it may enter the standby state for maximum 30 minutes (“...
Page 195: Outdoor Fan Control
'22 • PAC-SM-426 (4) Outdoor fan control (a) Outdoor fan tap and fan motor speed Unit: min Model Mode Fan motor tap ➀ speed ➁ speed ➂ speed ➃ speed ➄ speed ➅ speed ➆ speed FDC100-140 Cooling/Dehumidifying Heating Note (1) If the “silent mode start” signal is received from the remote control and SW7-3 is ON, the speed changes from 600 to 500. (b) Fan tap control during cooling/defumidifying operation Fan taps are selected depending on the outdoor heat exchanger temperature (Tho-R1, R2) and the outdoor air temperature (Tho-A).
Page 196: Defrost Operation
'22 • PAC-SM-426 (ii) The outdoor heat exchanger temperature is detected always and, when the number of revolutions of the outdoor fan speed has been increased or decreased, there is no change of fan speed for 20 seconds. (iii) Range of the outdoor fan speed under this control is as follows. a) Lower limit: 130min b) Upper limit: 350min (iv) As any of the following conditions is established, this control terminates.
Page 197: Protective Control/Anomalous Stop Control By Compressor S Number Of Revolutions
'22 • PAC-SM-426 (ii) Defrost conditions B 1) When previous defrost ending condition is the time out of defrost operation and it is in the heating operation after the accumulative compressor operation time after the end of defrost operation has become 30 minutes 2) After 5 minutes from the start of compressor 3) After 5 minutes from the start of outdoor fan (iii) Defrost condition C...
Page 198 '22 • PAC-SM-426 (ii) Anomalous stop control a) As the outdoor heat exchanger temperature (Tho-R) exceeds the setting value, the compressor stops. b) If it is detected 5 times within 60 minutes or 63°C or higher continues for 30 minutes, including the stop of compressor, E35 is displayed on the remote control and it enters the anomalous stop mode.
Page 199 '22 • PAC-SM-426 (f) Over-current protection current safe controls I, II Detecting the outdoor inverter input (primary) current and the output (secondary) current, if the current values exceed setting values, the compressor speed is controlled to protect the inverter. Reduces compressor speed at each minute.
Page 200: Silent Mode
'22 • PAC-SM-426 (k) Broken wire detection on temperature sensor and lowpressure sensor (i) Outdoor heat exchanger temperature sensor, outdoor air temperature sensor and low pressure sensor If the following is detected for 5 seconds continuously within 2 minutes to 2 minutes and 20 seconds after the compressor ON, the compressor stops.
Page 201: Pump-Down Control
'22 • PAC-SM-426 (9) Pump-down control When SW7-1 is OFF, turning ON the pump-down switch SW1 for 2 seconds during the operation stop or anomalous stop (excluding the thermostat OFF), the pump-down operation is performed. (This is invalid when the indoor unit is operating. This is effective even when the indoor unit is stopped by the anomalous stop or the power source is turned OFF.) (a) Control contents 1) Close the service valve at the liquid side.
Page 202: ) Models Fdc200, 250, 280Vsa-W
'22 • PAC-SM-426 Ⅱ ) Models FDC200, 250, 280VSA-W (1) Determination of compressor speed Required compressor speed (a) Cooling/dehumidifying operation. Unit: rps Model FDC200 FDC250 FDC280 Usual operation Outdoor air temperature ≦ 15°C or Max. required indoor return air temperature ≦ 20°C compressor speed Silent mode 50 (68) 70 (100) 80 (100)
Page 203: Compressor Start Control
'22 • PAC-SM-426 (2) Compressor start control (a) Compressor starts upon receipt of the thermostat ON signal from the indoor unit. (b) However, at initial start of heating mode after turning on the power source breaker, it may enter the standby state for maximum 30 minutes (“...
Page 204: Outdoor Fan Control
'22 • PAC-SM-426 (4) Outdoor fan control (a) Outdoor fan speed and fan motor revolution Unit: min Model Mode Fan motor revolution Speed Speed Speed Speed Speed Speed Speed ① ② ③ ④ ⑤ ⑥ ⑦ FDC200, 250 Cooling/Dehumidifying Heating Speed Speed Speed...
Page 205 '22 • PAC-SM-426 (c) Fan speed control during heating operation Fan speeds are selected depending on the outdoor heat exchanger temperature (Tho-R1, R2) and the outdoor air temperature (Tho-A). Note It is detected by Tho-R1 or R2, whichever the lower. 【...
Page 206 '22 • PAC-SM-426 (d) Outdoor fan control at cooling low outdoor air temperature (i) When all the following conditions are established after the start of compressor, the following control is implemented. If the outdoor air temperature (Tho-A) is in the zone in the cooling/dehumidifying mode, it has elapsed 20 seconds from the start of outdoor fan and the outdoor fan is at the speed ➀...
Page 207: Defrost Operation
'22 • PAC-SM-426 (5) Defrost operation (a) Starting conditions If all of the following defrost conditions A or conditions B or conditions C are satisfied, the defrost operation starts. (i) Defrost conditions A 1) Accumulative compressor operation time after the end of defrost operation has elapsed 37 minutes, and the accumulative compressor operation time after the start of heating operation (remote control ON) has elapsed...
Page 208: Protective Control/Anomalous Stop Control By Compressor S Number Of Revolutions
'22 • PAC-SM-426 (6) Protective control/anomalous stop control by compressor’s number of revolutions (a) Compressor discharge pipe temperature protection (i) Discharge pipe temperature control (Solenoid valve SV1 control(At heating mode)) The solenoid valve SV1 opens to suppress the rise of discharge pipe temperature. 1) SV1 open condition In case the following conditions and other certain conditions are satisfied.
Page 209 '22 • PAC-SM-426 (b) Cooling high pressure protection (i) Protective control 1 (Compressor speed control) 1) Outdoor heat exchanger temperature (Tho-R) exceeds the control value A. Value A is changed from 59°C to 53°C by number of 63H1 operations. 2) When the outdoor air temperature (Tho-A) is 40°C or higher 3) If outdoor heat exchanger temperature (Tho-R) is less than the control value A continuously for 6minutes, protective control finishes.
Page 210 '22 • PAC-SM-426 (c) Heating high pressure protection (i) Protective control 1) As the indoor heat exchanger temperature (Thi-R) exceeds the setting value, the compressor speed is controlled to suppress the rise of high pressure. 2) Control value A is changed from 57°C to 51°C by number of 63H1 operations. Model Control value A (°C) Reduces compressor speed...
Page 211 '22 • PAC-SM-426 (g) Over-current protection current safe controls I, II Detecting the outdoor inverter input (primary) current and the output (secondary) current, if the current values exceed setting values, the compressor speed is controlled to protect the inverter. unit : A Reduces compressor speed Cooling Heating...
Page 212 '22 • PAC-SM-426 ( l ) Dewing prevention control [Control condition] During cooling and dehumidifying operation, if all the following conditions are established, the compressor speed is reduced to prevent dewing and water splash. (i) Cooling electronic expansion valve aperture (EEVC) is 500 pulses. (ii) Suction superheat is more than 10°C.
Page 213: Silent Mode
'22 • PAC-SM-426 (7) Silent mode (a) As “Silent mode start” signal is received from the remote control, it operates by dropping the outdoor fan speed and the compressor speed. (b) For details, refer to items (1) and (4) above. (8) Test run (a) It is possible to operate from the outdoor unit using the DIP switch on the outdoor unit control PCB.
Page 214: Base Heater On/Off Output Control (Option)
'22 • PAC-SM-426 (10) Base heater ON/OFF output control (Option) (i) Base heater ON conditions When all of following conditions are satisfied, the base heater is turned ON. ・Outdoor air temperature (detected with Tho-A) is 1ºC or lower. ・In the heating mode ・When the compressor is turned ON (ii) Base heater OFF conditions When either one of following conditions is satisfied, the base heater is turned OFF.
Page 215: Disassembly Procedure
'22 • PAC-SM-426 PJF012D045 2.3 DISASSEMBLY PROCEDURE DISASSEMBLY PROCEDURE PCA012D089A DISASSEMBLY PROCEDURE Precaut ions for safety Precau afety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn oﬀ the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
Page 216: Cooling Overload Protective Control
PCA012D089A PROCEDURE & PICTURES PCA012D089A '22 • PAC-SM-426 PROCEDURE & PICTURES 7. To remove the low pressure sensor (PSL) (1) Remove the service panel.(See No.1.) (2) Disconnect the PSL connector(CNPSL) on PCB in control box. 7. To remove the low pressure sensor (PSL) (3) Turn PSL un lockwise and remove it.
Page 217: Current Cut
Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. ● When disassembling, be sure to turn oﬀ the power. When disassembling the electrical components, check the electrical wiring diagram. ●...
Page 218: Broken Wire Detection On Temperature Sensor
'22 • PAC-SM-426 Coil of EEVC 6. To remove the electronic expansion valves (example"EEVC") (1) Remove the service panel and rear panel.(See No.1,2.) (2) Disconnect the EEVC connector(CNEEV1) on PCB in control box. (3) Remove the EEVC coil wiring ﬁxing bands. (3) Remove the EEVC coil by pull out on the top.
Page 219 '22 • PAC-SM-426 ① ② 11. To remove the printed circuit board (PCB) ≪Control PCB≫ (1) Remove the service panel.(See No.1.) (2) Pull oﬀ all the inserted connectors of control PCB.(Pic. ① (3) Remove wiring ﬁxing screw of noise ﬁlter PCB.(◇ mark, Pic. ①...
Page 220: Electrical Wiring
'22 • PAC-SM-426 2.4 ELECTRICAL WIRING (1) Indoor units ........................... See page 185. (2) Outdoor units Model FDC100VNA-W, 125VNA-W, 140VNA-W PCA001Z854...
Page 221 '22 • PAC-SM-426 Models FDC100VSA-W, 125VSA-W, 140VSA-W PCA001Z855...
Page 222 '22 • PAC-SM-426 Models FDC200VSA-W, 250VSA-W, 280VSA-W PCB004Z471...
Page 223: Piping System
'22 • PAC-SM-426 2.5 PIPING SYSTEM (1) Models FDC100-140VNA-W, 100-140VSA-W (a) Single type Models 100, 125, 140 Indoor unit Outdoor unit Cooling cycle Heating cycle 4-way valve Check joint Temperature sensor Muffler (Tho-A) Gas line 15.88) φ Flare connecting Service valve (Flare connecting) Temperature sensor (Heat e xchanger)
Page 224 '22 • PAC-SM-426 Preset point of the protective devices Equipped Parts name Mark 100, 125, 140 model unit Temperature sensor Active 63˚C Th i -R (for protection over- Inactive 56˚C loading in heating) Indoor unit Temperature sensor Active 1.0˚C Th i -R (for frost prevention) Inactive 10˚C Temperature sensor...
Page 225 Strainer Strainer Strainer Strainer Service valve (Flare connecting) Liquid Electronic Electronic branch pipe expansion valve expansion valve (heating)(EEVH) (cooling)(EEVC) (φ9.52) Receiver '22 • PAC-SM-426 (2) Models FDC200-280VSA-W Twin type Gas branch pipe Models 200, 250, 280 (φ15.88) Indoor unit Indoor unit Outdoor unit Cooling cycle Heating cycle...
Page 226 '22 • PAC-SM-426 3. STANDARD INVERTER PACKAGED AIR-CONDITIONERS CONTENTS 3.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ……… 226 3.1.1 Remote control (Option parts) ………………………………………… 226 3.1.2 Operation control function by the wired remote control ………… 226 3.1.3 Operation control function by the indoor control ………………… 226 3.1.4 Operation control function by the outdoor control …………………...
Page 227: Outline Of Operation Control By Microcomputer
'22 • PAC-SM-426 3.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 3.1.1 Remote control (option parts) ………………………………………… See page 4. 3.1.2 Operation control function by the wired remote control ………… See page 7. 3.1.3 Operation control function by the indoor control …………………See page 10. 3.1.4 Operation control function by the outdoor control (1) Compressor speed Unit: rps...
Page 228 '22 • PAC-SM-426 (c) Relationship between compressor speed and outdoor fan speed Outdoor fan speed is controlled according to the operation mode (Heating/cooling) and the compressor speed. Unit: rps Fan speed 1st speed 2nd speed 3rd speed 4th speed 5th speed 6th speed 7th speed 8th speed...
Page 229: Defrost Operation
'22 • PAC-SM-426 (ii) Heating 1) Operating conditions When the outdoor air temperature (TH2) is 13ºC or higher for 30 seconds continuously while the compressor speed is other than 0 rps 2) Detail of operation After the outdoor fan operates at -3 speed for 60 seconds; the corresponding outdoor heat exchanger temperature shall implement the following controls.
Page 230: Cooling Overload Protective Control
'22 • PAC-SM-426 (b) Ending conditions (Operation returns to the heating cycle when either one of the following is satisfied.) (i) Outdoor heat exchanger sensor (TH1) temperature: 10ºC or higher (ii) Continued operation time of defrost operation → For more than 15 minutes •...
Page 231: Cooling Low Outdoor Air Temperature Protective Control
lower limit After lapse of 20 sec. or over speed 30 rps 0rps '22 • PAC-SM-426 Outdoor heat exchanger temperature (°C) (7) Cooling low outdoor air temperature protective control (a) Operating conditions When the outdoor air temperature (TH2) is CºC or lower for 20 seconds continuously while the compressor speed is other than 0 rps (b) Detail of operation (i) The lower limit of the compressor speed is set to 45 (35) <20>...
Page 232: Heating Overload Protective Control
'22 • PAC-SM-426 (9) Heating overload protective control (a) Operating conditions When the outdoor air temperature (TH2) is 13°C or higher continues for 30 seconds while the compressor speed is other than 0 rps (b) Detail of operation 90(75)rps calculation exceeds the upper limit, the upper limit value is maintained.
Page 233: Current Safe
'22 • PAC-SM-426 (ii) If the temperature of 115ºC is detected by the sensor on the discharge pipe, then the compressor will stop immediately. When the discharge pipe temperature drops and the time delay of 3 minutes is over, the unit starts again within 1 hour but there is no start at the third time.
Page 234: Maintenance Data
'22 • PAC-SM-426 (18) Silent mode As “Silent mode start” signal is received from the remote control, it operates by dropping the outdoor fan speed. Item Outdoor fan tap (Upper limit) Model FDC71VNP-W Cooling: 7th speed, Heating: 7th speed FDC90, 100VNP-W Cooling: 7th speed, Heating: 5th speed (19) Broken wire detection on temperature sensor (a) Outdoor heat exchanger temperature sersor, outdoor air temperature sensor...
Page 235: Electrical Wiring
'22 • PAC-SM-426 3.3 ELECTRICAL WIRING (1) Indoor units ……………………………………………………………………………………………… See page 185. (2) Outdoor units Model FDC71VNP-W PCA001Z873...
Page 236 '22 • PAC-SM-426 Models FDC90VNP-W, 100VNP-W PCA001Z876...
Page 237: Piping System
'22 • PAC-SM-426 3.4 PIPING SYSTEM Model 71 Indoor unit Outdoor unit Heating cycle Cooling cycle Service valve Outdoor air temperature sensor Gas pipe (Flare connecting) (φ12.7) (TH2) Muffler Discharge pipe Temperature sensor temperature sensor (Heat Reducer (TH3) exchanger) Check joint (Thi-R3) (Accessory) Temperature sensor...
Page 238 Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. © Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.

Mitsubishi Heavy Industries FDF71VNXWVH Service Manual

Micro Inverter Packaged Air-Conditioners

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