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No. Part to be replaced Work procedure Remarks 9 4-way valve - detachment/ attachment (continued) MAP1404 MAP1604 WARNING Wear a pair of gloves. Otherwise, you will risk an injury involving a replacement part or some other object. Before starting the work, be sure to recover the refrigerant of outdoor unit by removing it with a refrigerant recovery device. 4) Brazed point PMV 1. Detachment 1)Remove the lower cabinet (front side). 2)Remove the inverter box in accordance with the dismantling instructions. 3)Disconnect the 4-way valve coil and PMV coils (3 pieces) and get all wiring located near the 4-way valve out of the way. 4)Remove brazed points (3 locations) for the PMV assembly, which is placed in front of the 4-way valve. * Provide adequate cover for the PMV proper to protect it from overheating. 5)Since it is difficult to simultaneously remove the brazed points for the pipes located above the 4- way valve (3 pieces), cut through them just below the brazed points using a saw, etc. 6)Detach the pipe located below the 4-way valve. 7)Remove the end sections of the pipes above the 4-way valve, which were cut in step 5). 8)Install a new 4-way valve. * Provide adequate cover for the 4-way valve to protect it from overheating. During the installation, insert pipes firmly into the 4-way valve, or a blockage or leakage involving brazing filler metal may result. 9)Reinstall the PMV assembly, which was removed in step 4). * Provide adequate cover for the PMV to protect it from overheating. 10) Reinstall all the coils removed in step 3), and put the wiring back to its initial state. 11) Reinstall the inverter box in accordance with the installation instructions. 12) Reinstall the lower cabinet. 7) End sections of pipes (3 pieces) 4-way valve 6) Brazed point 4) Brazed point 5) Cutting line Removing of brazed point on left side of strainer (1 location) 4-way valve proper Cutting through of pipes located above 4- way valve (3 pieces) Removing of brazed point at back of PMV (1 location) Removing of brazed point for pipe located below 4-way valve (1 location) PMV assembly Before Removal of PMV Assembly After Removal of PMV Assembly 275
13P.C. BOARD EXCHANGE PROCEDURES Indoor Unit 13-1.Replacement of Indoor P.C. Boards Part code Model type P.C. board type 431-6V-379 MMU-AP2H series MCC-1570 431-6V-437 Points to Note When Replacing Indoor P.C. Board Assembly The electrically erasable programmable read-only memory (hereinafter EEPROM, IC10) mounted on an indoor P.C. board holds important setting data, including the type and capacity codes intrinsic to the model (set at the factory), as well as the line/indoor/group addresses, high ceiling adjustment setting and the like (during installation, either automatically or manually). Proceed with the replacement of an indoor P.C. board assembly in accordance with the procedure described below. After completion of the work, check the settings again, including the indoor unit No. and group header/follower designation, and confirm the integrity of the refrigerating cycle by conducting a test operation, etc. MMU-AP2WH series MMU-AP1MH series MMU-AP2SH series MMC-AP1H series MMD-AP1SPH/SH series Method 1 If it is possible to turn on the indoor unit and read the setting data from the P.C. board to be replaced via a wired remote controller - Reading EEPROM data: Procedure 1 MCC-1402 431-6V-325 MMD-AP1BH series MCC-1402 431-6V-326 MMU-AP1WH series MMU-AP1YH series MMD-AP1H series MMF-AP1H series MML-AP1H series MML-AP1BH series MCC-1403 431-6V-343 MMD-AP1HFE series MCC-1403 Replacing P.C. board and turning on power: Procedure 2 Writing EEPROM data in new EEPROM: Procedure 3 Resetting power supply (applicable to all indoor units connected to remote controller in case of group operation) 276
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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
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7-4. Address Setup This product req
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(Example) Controlling 2 or more ref
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10 Set the central control address.
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Manual address setup from the remot
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To find an indoor unit’s position
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4 Push the TIME / buttons repeatedl
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2) Turn on dip switch 2 of SW30 on
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7-4-4. Check after Address Setup wh
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7-5-2. Operation from the indoor re
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Miswiring example Figure Remote con
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7-6-2. Cooling/Heating Test Operati
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(2) Test operation START Test opera
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7-7. Service Support Function 7-7-1
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7-7-2. Function to Start/Stop (ON/O
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(2) Heating test operation function
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(4) Individual start/stop (ON/OFF)
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(2)Clearing error by using switches
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7-7-5. Pulse Motor Valve (PMV) Forc
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7-7-8. Fan Operation Check in Outdo
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7-7-10.Manual Adjustment Function o
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7-7-11.Monitor Function of Remote C
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8 TROUBLESHOOTING 8-1. Overview (1)
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(Error detected by main remote cont
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F12 - F12 ALT F15 - F15 ALT F16 - F
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(Errors detected by IPDU featuring
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Using TCC-LINK central control remo
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Light block Check code Cause of fau
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8-4. Check Codes Displayed on Remot
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Main remote controller Check code O
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Main remote controller P04 P05 P07
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Errors Detected by TCC-LINK Central
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8-5. Diagnosis procedure for each c
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Check code Check code name Cause Ch
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Check code Check code name Cause [E
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Check code Check code name Cause [E
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Check code Check code name Cause [F
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Check code Check code name Cause [H
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(*3) Check for solenoid valve of al
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Check code Check code name Cause [L
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Check code Check code name Cause [P
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(C) Heating operation Does heating
Page 225 and 226: Check code Check code name Cause [P
Page 227 and 228: (1)Display of System Information (D
Page 229 and 230: (3)Display of Outdoor Cycle Data (D
Page 231 and 232: (5)Display of Indoor Unit Informati
Page 233 and 234: 8-8. Leakage/Clogging of Refrigerat
Page 235 and 236: List of Check Codes Generated upon
Page 237 and 238: 8-9. Sensor Characteristics Outdoor
Page 239 and 240: Indoor TC1 sensor 200 150 Resistanc
Page 241 and 242: 240 Outdoor Unit ▼ Ps sensor char
Page 243 and 244: 9-2. Compressor Backup Operation Se
Page 245 and 246: (6) Turn on the power supply to all
Page 247 and 248: (8) Set Bits 1 and 2 of SW30 on the
Page 249 and 250: 10OUTDOOR UNIT REFRIGERANT RECOVERY
Page 251 and 252: [Setup of failed outdoor unit] (13)
Page 253 and 254: [Setup of outdoor units other than
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Page 257 and 258: 11-2.Replacement of Compressors
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Page 261 and 262: 11-3.Check Procedure to Search Caus
Page 263 and 264: Check items and procedures to follo
Page 265 and 266: No. Part to be replaced Work proced
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Page 279 and 280: Procedure 1: Reading Setting Data f
Page 281 and 282: Procedure 3: Writing Setting Data i
Page 283 and 284: CODE No. list (Example) CODE No. (D
Page 285 and 286: 13-2-3.Interface board (MCC-1606) r
Page 287 and 288: (6) Set the dip switch (SW800) sett
Page 289 and 290: 13-2-6.Noise Filter P.C. Board (MCC
Page 291 and 292: (7) Install the service P.C. boards
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Page 295 and 296: SMMS-i OUTDOOR UNIT MMY-MAP1404HT8(
Page 297 and 298: REFRIGERATION CIRCUIT DIAGRAM M MOT
Page 299 and 300: Ref. No. Part No. Description MAP08
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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-MAP1404HT8(
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SMMS-i OUTDOOR UNIT MMY-MAP0804HT7(
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SMMS-i OUTDOOR UNIT MMY-MAP1404T8-S
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WARNINGS ON REFRIGERANT LEAKAGE Che
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