SCM60-125ZJ-SS. Introduction of new feature. 11/Mar/ MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved.

Contents 1. Specification 2. Piping limitation 3. Installation limitation 4. Refrigeration circuit control pattern 5. Troubleshooting procedure 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 1

1.Specification 1-1 Table of models Capacity 2.0 2.5 3.5 5.0 6.0 Model Wall Mounted (SRKxxZJX-SS) Wall Mounted (SRKxxZK-SS) 7.1 Wall Mounted (SRKxxZJ-SS) Duct (SRRxxZJ-SS) 4 Way Ceiling (FDTCxxVF) Outdoor SCM60ZJ-SS, SCM80ZJ-SS, SCM100ZJ-SS, SCM125ZJ-SS 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 2

1.Specification 1-2 Outdoor unit If it s needed bigger capacity : Micro KX6 series 2 or 3 Indoor units can be connectable. See the Next page 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 3

1.Specification 1-3 Number of connectable Indoor units SCM60ZJ-SS SCM80ZJ-SS SCM100ZJ-SS SCM125ZJ-SS Min 2 2 4* 4* Max 3 4 5 6 * In case of SRK71ZK-SS+SRK71ZK-SS, 2 Indoor units can be connectable. In case of the combination with SRK20/25/35/45/60ZJX-SS and SRK71ZK-SS, any 3 Indoor units can be connectable. The total connecting capacity of Indoor units should be between 10.0kW ~16.0kW. 1-4 The Capacity of Connectable total Indoor units SCM60ZJ-SS SCM80ZJ-SS SCM100ZJ-SS SCM125ZJ-SS kw 11.0 13.5 16.0 19.5 [ Example of connectable Indoor units ] 2 Indoor units can be connectable. 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 4

1.Specification 1-3 Indoor unit Ceiling Concealed type SRR Wall Mounted type ZJX, ZK, ZJ SRK 4way Ceiling Cassette type FDTC 3 type 5 models 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 5

2.Piping limitation SCM60ZJ-SS SCM80ZJ-SS Additional charge amount of 20g / m SCM100ZJ-SS, SCM125ZJ-SS FDC112KXEN6, FDC140KXEN6, FDC155KXEN6 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 6

3.Installation limitation 3-1 Beware of wrong connections in refrigerant piping and wiring 1.5mm2 4cores Including earth cable 1.5mm2 3cores Including earth cable Circuit breaker 25A(60/80) 30A(100/125) 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 7

3.Installation limitation 3-3 Insulation of pipe There is a cooling EEV in the outdoor SCM unit Insulation of piping is more important than KX6 unit. <Cooling operation> KX6 position SCM position < Refrigerant > SCM : Mixing liquid and gas KX6 : Liquid Evaporation From part of evaporator < Insulation of pipe > Very important 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 9

Heat exchanger Comp. 4.Refrigeration circuit control pattern 4-1 Control of capacity By calculating the deviation between the set temperature and the room temperature of each room, then the compressor rotation frequency is adjusted. Room(a) Request Hz : RaHz = Thi-A Thi-R1 Compressor Hz : RaHz + RbHz + RcHz KX6 High pressure sensor KX6 Low pressure sensor Thi-R3 Room(c) Room(b) Room(a) Thi-R1 Thi-R2 KX6 unit Control of pressure Cooling : Target of Low pressure Heating : Target of High pressure Temp. of return air Thi-A 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 10

Heat exchanger 4.Refrigeration circuit control pattern 4-2 Super Heat Control Control of Super Heat By EEV Cooling SH = Tho-S -Thi-R1(*1) (*1)Average of operation indoor units Heating SH = Tho-S -Tho-R Tho-R LP sensor CSST Thi-R3 Tho-S Tho-R Room(c) Room(b) Room(a) Thi-R1 Thi-R2 KX6 unit Cooling : Thi-R3-R1 or R2 =3 Control of Indoor unit EEV Heating : Tho-R - CSST Control of Outdoor unit EEV Temp. of return air Thi-A 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 11

Heat exchanger Comp. 4.Refrigeration circuit control pattern 4-3 Protective Control (1)Discharge temperature Control Tho-D 105 >Compressor Hz down Tho-D 115 >Compressor stop Tho-A (2)High pressure control SCM100/125ZJ only HP sensor 3.85Mpa >Compressor Hz down HP sensor 4.05Mpa >Compressor stop Tho-D High pressure sensor Thi-R1 (3)High pressure control SCM60/80ZJ only <Heating> Thi-R1 55 >Compressor Hz down <Cooling> Tho-A 47 >Compressor Hz down 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 12

5.Troubleshooting procedure 5-2 Troubleshooting without COMT RUN Light TIMER Light Confirm following 2 items 1) 2 display lights of I/D 2) LED lights on PCB in O/D Refer to Technical data book to confirm cause of problem. RED LED Troubleshooting is very difficult by Wireless remote Controller Wired Remote Controller can provide more info than Wireless one. Sometimes, it is easy to understand error code. 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 17