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Using indoor unit indicators (receiving unit light block) (wireless type) To identify the check code, check the 7-segment display on the header unit. To check for check codes not displayed on the 7-segment display, consult the “List of Check Codes (Indoor Unit)” in “8-2. Troubleshooting Method”. : Goes off : Lighting : Blinking (0.5 seconds) Light block Check code Cause of fault Operation Timer All lights out Ready – Power turned off or error in wiring between receiving and indoor units Operation Timer Ready E01 E02 E03 Faulty reception Faulty transmission Loss of communication Receiving unit Error or poor contact in wiring between receiving and indoor units Blinking E08 E09 Duplicated indoor unit No. (address) Duplicated master remote controller Setting error E10 Indoor unit inter-MCU communication error E12 Automatic address starting error E18 Error or poor contact in wiring between indoor units, indoor power turned off Operation Timer Ready E04 Error or poor contact in wiring between indoor and outdoor units (loss of indoor-outdoor communication) E06 Faulty reception in indoor-outdoor communication (dropping out of indoor unit) Blinking E07 E15 Faulty transmission in indoor-outdoor communication Indoor unit not found during automatic address setting E16 Too many indoor units connected/overloading E19 Error in number of outdoor header units E20 Detection of refrigerant piping communication error during automatic address setting E23 Faulty transmission in outdoor-outdoor communication E25 Duplicated follower outdoor address E26 Faulty reception in outdoor-outdoor communication, dropping out of outdoor unit E28 Outdoor follower unit error E31 IPDU communication error Operation Timer Ready P01 P10 Indoor AC fan error Indoor overflow error P12 Indoor DC fan error Alternate blinking Operation Timer Ready Alternate blinking P13 P03 P04 P05 P07 P15 P17 P18 P19 P20 P22 P26 P29 P31 Outdoor liquid backflow detection error Outdoor discharge (TD1) temperature error Activation of outdoor high-pressure SW Open phase/power failure Inverter DC voltage (Vdc) error MG-CTT error Outdoor heat sink overheating error - Poor cooling of electrical component (IGBT) of outdoor unit Gas leak detection - insufficient refrigerant charging Outdoor discharge (TD2) temperature error Outdoor discharge (TD3) temperature error Outdoor 4-way valve reversing error Activation of high-pressure protection Outdoor fan IPDU error Outdoor G-Tr short-circuit error Compressor position detection circuit error Shutdown of other indoor unit in group due to fault (group follower unit error) MG-CTT: Magnet contactor 175
Light block Check code Cause of fault Operation Timer Alternate blinking Operation Timer Alternate blinking Ready Ready F01 F02 F03 F10 F11 F04 F05 F06 F07 F08 F12 F13 F15 Heat exchanger temperature sensor (TCJ) error Heat exchanger temperature sensor (TC2) error Heat exchanger temperature sensor (TC1) error Ambient temperature sensor (TA) error Discharge temperature sensor (TF) error Discharge temperature sensor (TD1) error Discharge temperature sensor (TD2) error Heat exchanger temperature sensor (TE1, TE2) error Liquid temperature sensor (TL) error Outside air temperature sensor (TO) error Suction temperature sensor (TS1) error Heat sink sensor (TH) error Indoor unit temperature sensor errors Outdoor unit temperature sensor errors Wiring error in heat exchanger sensor (TE1) and liquid temperature sensor (TL) Outdoor unit temperature sensor wiring/installation error F16 Wiring error in outdoor high pressure sensor (Pd) and low pressure sensor (Ps) Outdoor pressure sensor wiring error F22 Outdoor discharge temperature sensor (TD3) error F23 Low pressure sensor (Ps) error Outdoor unit pressure sensor F24 High pressure sensor (Pd) error errors Operation Timer Ready F29 Fault in indoor EEPROM Synchronized blinking Operation Timer Blinking Ready H01 H02 H03 H05 Compressor breakdown Outdoor unit compressorrelated errors Compressor lockup Current detection circuit error Wiring/installation error or detachment of outdoor discharge temperature sensor (TD1) Operation Timer Ready Synchronized blinking Operation Timer Ready Synchronized blinking H06 Abnormal drop in low-pressure sensor (Ps) reading Protective shutdown of outdoor H07 Abnormal drop in oil level unit H08 Error in temperature sensor for oil level detection circuit (TK1, TK2, TK3, TK4 or TK5) H15 Wiring/installation error or detachment of outdoor discharge temperature sensor (TD2) H16 Oil level detection circuit error - Error in outdoor unit TK1, TK2, TK3, TK4 or TK5 circuit H25 Wiring/installation error or detachment of outdoor discharge temperature sensor (TD3) L03 Duplicated indoor group header unit L05 Duplicated priority indoor unit (as displayed on priority indoor unit) L06 Duplicated priority indoor unit (as displayed on indoor unit other than priority indoor unit) L07 Connection of group control cable to stand-alone indoor unit L08 Indoor group address not set L09 Indoor capacity not set L04 Duplicated outdoor refrigerant line address L10 Outdoor capacity not set L17 Outdoor model incompatibility error L18 Flow selector units error L20 Duplicated central control address L28 Too many outdoor units connected L29 Error in number of IPDUs L30 Indoor external interlock error 176
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AIR CONDITIONER (MULTI TYPE) SERVIC
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4-1. Normal Operation (COOL Mode /
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9-4. Cooling-Season Outdoor Unit Ba
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Definition of Protective Gear When
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Precautions for Safety The manufact
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Use specified parts. When any of th
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Only a qualified installer (*1) or
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Specifications Model MMY-MAP0804HT8
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Carrying in the Outdoor Unit CAUTIO
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Selection of Pipe Size Coupling siz
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Table 2 Standard type High Efficien
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4. Tools (1) Required Tools for R41
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Models: MMY-MAP1404* and MAP1604 *
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1-2-2. Compact 4-way Cassette Type
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1-2-4. 1-way Air Discharge Cassette
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1-2-6. 2-way Air Discharge Cassette
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1-2-8. Concealed Duct High Static P
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1-2-9. Slim Duct Type Models: MMD-A
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1-2-11.High Wall Type 2 series Mode
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1-2-13.Floor Standing Cabinet Type
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1-2-15.Floor Standing Type Models:
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Models: MMD-AP0721HFE and MMD-AP096
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2-2. Outdoor Unit (60Hz model: MMY-
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2-4. Outdoor Inverter (60Hz model:
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2-way Air Discharge Cassette Type M
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Concealed Duct High Static Pressure
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Floor Standing Type Model MMF-AP 01
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14, 16HP Model: MMY-MAP1404* , MAP1
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Outdoor Unit (14, 16HP) Model: MMY-
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2-8-2. Inverter P.C. board for comp
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3 Refrigerant Piping Systematic Dra
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Explanation of Functional Parts Fun
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4 Combined Refrigerant Piping Syste
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4-3. Normal Operation (HEAT Mode) H
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4-5. Emergency Operation (Heating O
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5 Control Outline Indoor Unit Cont
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NO. Item Specification outline Rema
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NO. Item Specification outline Rema
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Outdoor Unit Item Description of op
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Item Description of operation, nume
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1 Cooling operation under low outsi
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Central control remote controller (
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6-1-2. When Wireless Remote Control
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Central control remote controller (
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X Y DC5V Power supply circuit Main
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6-2. Indoor Printed Circuit Board M
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MCC-1403 Power supply Power supply
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6-4. Test Operation of Indoor Unit
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Function CODE No. (DN Code) Table (
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Type DN code “10” Value Type Mo
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▼ Ventilating fan control from re
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6-7. Applied control for Outdoor Un
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(2) Indoor unit setup method for pr
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6-8-1. Power peak-cut Control (Stan
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6-8-3. Snowfall Fan Control Header
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6-8-6. Operation Mode Selection Con
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6-8-8. Compressor Operation Output
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7 TEST OPERATION 7-1. Procedure and
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(2) In the case that a central cont
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• Check the additional amount of
Page 125 and 126: 7-4. Address Setup This product req
Page 127 and 128: (Example) Controlling 2 or more ref
Page 129 and 130: 10 Set the central control address.
Page 131 and 132: Manual address setup from the remot
Page 133 and 134: To find an indoor unit’s position
Page 135 and 136: 4 Push the TIME / buttons repeatedl
Page 137 and 138: 2) Turn on dip switch 2 of SW30 on
Page 139 and 140: 7-4-4. Check after Address Setup wh
Page 141 and 142: 7-5-2. Operation from the indoor re
Page 143 and 144: Miswiring example Figure Remote con
Page 145 and 146: 7-6-2. Cooling/Heating Test Operati
Page 147 and 148: (2) Test operation START Test opera
Page 149 and 150: 7-7. Service Support Function 7-7-1
Page 151 and 152: 7-7-2. Function to Start/Stop (ON/O
Page 153 and 154: (2) Heating test operation function
Page 155 and 156: (4) Individual start/stop (ON/OFF)
Page 157 and 158: (2)Clearing error by using switches
Page 159 and 160: 7-7-5. Pulse Motor Valve (PMV) Forc
Page 161 and 162: 7-7-8. Fan Operation Check in Outdo
Page 163 and 164: 7-7-10.Manual Adjustment Function o
Page 165 and 166: 7-7-11.Monitor Function of Remote C
Page 167 and 168: 8 TROUBLESHOOTING 8-1. Overview (1)
Page 169 and 170: (Error detected by main remote cont
Page 171 and 172: F12 - F12 ALT F15 - F15 ALT F16 - F
Page 173 and 174: (Errors detected by IPDU featuring
Page 175: Using TCC-LINK central control remo
Page 179 and 180: 8-4. Check Codes Displayed on Remot
Page 181 and 182: Main remote controller Check code O
Page 189 and 190: Main remote controller P04 P05 P07
Page 193 and 194: Errors Detected by TCC-LINK Central
Page 195 and 196: 8-5. Diagnosis procedure for each c
Page 197 and 198: Check code Check code name Cause Ch
Page 199 and 200: Check code Check code name Cause [E
Page 201 and 202: Check code Check code name Cause [E
Page 203 and 204: Check code Check code name Cause [F
Page 205 and 206: Check code Check code name Cause [H
Page 209 and 210: (*3) Check for solenoid valve of al
Page 215 and 216: Check code Check code name Cause [L
Page 217 and 218: Check code Check code name Cause [P
Page 223 and 224: (C) Heating operation Does heating
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(1)Display of System Information (D
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(3)Display of Outdoor Cycle Data (D
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(5)Display of Indoor Unit Informati
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8-8. Leakage/Clogging of Refrigerat
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List of Check Codes Generated upon
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8-9. Sensor Characteristics Outdoor
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Indoor TC1 sensor 200 150 Resistanc
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240 Outdoor Unit ▼ Ps sensor char
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9-2. Compressor Backup Operation Se
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(6) Turn on the power supply to all
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(8) Set Bits 1 and 2 of SW30 on the
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10OUTDOOR UNIT REFRIGERANT RECOVERY
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[Setup of failed outdoor unit] (13)
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[Setup of outdoor units other than
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10-3.Work procedure after Repair Wh
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11-2.Replacement of Compressors
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[When replacing normal as well as f
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11-3.Check Procedure to Search Caus
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Check items and procedures to follo
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No. Part to be replaced Work proced
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13P.C. BOARD EXCHANGE PROCEDURES I
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Procedure 1: Reading Setting Data f
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Procedure 3: Writing Setting Data i
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CODE No. list (Example) CODE No. (D
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13-2-3.Interface board (MCC-1606) r
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(6) Set the dip switch (SW800) sett
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13-2-6.Noise Filter P.C. Board (MCC
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(7) Install the service P.C. boards
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SMMS-i OUTDOOR UNIT MMY-MAP1404HT8(
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REFRIGERATION CIRCUIT DIAGRAM M MOT
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Ref. No. Part No. Description MAP08
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SMMS-i INV SERVICE PARTS LIST MMY-M
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SMMS-i OUTDOOR UNIT MMY-MAP0804T8(Z
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SMMS-i OUTDOOR UNIT MMY-MAP0804T8(Z
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SMMS-i OUTDOOR UNIT MMY-MAP1404T8-S
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WARNINGS ON REFRIGERANT LEAKAGE Che
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