Mitsubishi Heavy Industries SRK20ZJ-S Technical Manual
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Mitsubishi Heavy Industries SRK20ZJ-S Technical Manual

Inverter residential air conditioners (split system, air to air heat pump type)
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See also: Service Manual , Technical Manual
TECHNICAL MANUAL
INVERTER RESIDENTIAL AIR CONDITIONERS
(Split system, air to air heat pump type)
Wall mounted type
SRK20ZJ-S
SRK25ZJ-S
SRK35ZJ-S
50ZJ-S
SRK20ZJX-S
SRK25ZJX-S
SRK35ZJX-S
SRK50ZJX-S
SRK60ZJX-S
Ceiling cassette-4way compact type
FDTC25VD
FDTC35VD
Floor standing type
SRF25ZJX-S
SRF35ZJX-S
SRF50ZJX-S
Manual No.'10•SR-T-091
Ceiling concealed type
SRR25ZJ-S
SRR35ZJ-S

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Summary of Contents for Mitsubishi Heavy Industries SRK20ZJ-S

  • Page 1 Manual No.'10•SR-T-091 TECHNICAL MANUAL INVERTER RESIDENTIAL AIR CONDITIONERS (Split system, air to air heat pump type) Wall mounted type Floor standing type Ceiling concealed type SRK20ZJ-S SRF25ZJX-S SRR25ZJ-S SRK25ZJ-S SRF35ZJX-S SRR35ZJ-S SRK35ZJ-S SRF50ZJX-S 50ZJ-S SRK20ZJX-S SRK25ZJX-S SRK35ZJX-S SRK50ZJX-S SRK60ZJX-S Ceiling cassette-4way compact type...
  • Page 2 '10 • SR-T-091 CONTENTS 1. SPECIFICATIONS ..................(1) Wall mounted type (SRK) ..............(2) Floor standing type (SRF) ..............14 (3) Ceiling concealed type (SRR) .............. 17 (4) Ceiling cassette-4way compact type (FDTC) ........19 2. EXTERIOR DIMENSIONS ................. 21 (1) Indoor units ..................
  • Page 3 '10 • SR-T-091 10. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ....111 10.1 Models SRK20 50ZJ-S ..............111 (1) Operation control function by remote controller ........111 (2) Unit ON/OFF button ................112 (3) Auto restart function .................112 (4) Custom cord switching procedure ............112 (5) Flap and louver control ..............113 (6) 3D auto operation...
  • Page 4 '10 • SR-T-091 (9) Outline of cooling operation ..............143 (10) Outline of automatic operation ............143 (11) Protective control function ..............144 10.4 Models SRR25 35ZJ-S ...............150 (1) Operation control function by remote controller ........150 (2) Unit ON/OFF button ................151 (3) Auto restart function ................151 (4) Custom cord switching procedure ............151...
  • Page 5 '10 • SR-T-091 (4) Check of anomalous operation data with the remote controller ..206 (5) Inverter checker for diagnosis of inverter output ........207 (6) Outdoor unit controller failure diagnosis circuit diagram .....208 11.2.2 Troubleshooting flow ..............209 (1) List of troubles ..................209 (2) Troubleshooting ..................210...

  • Page 6: Option Parts

    '10 • SR-T-091 12. OPTION PARTS PJA012D729A 12.1 Instullation of wired remote controller (RC-E4) Read together with indoor unit's installation manual. WARNING Fasten the wiring to the terminal securely and hold the cable securely so as not to apply unexpected stress on the terminal.

  • Page 7: Outdoor Units

    '10 • SR-T-091 Connect the remote controller cord to the Sheath Sheath Upper Upper terminal block. Upper case Connect the terminal of remote controller (X,Y) Upper case Board Board with the terminal of indoor unit (X,Y). (X and Y are no polarity) Wiring route is as shown in the right diagram depending on the pulling out direction.

  • Page 8: Remote Controller

    '10 • SR-T-091 The range of temperature setting When shipped, the range of set temperature differs depending on the operation mode as below. Heating : 16 ~ 30˚C (55 ~ 86˚F) Except heating (cooling, fan, dry, automatic) : 18 ~ 30˚C (62 ~ 86˚F) Upper limit and lower limit of set temperature can be changed with remote controller.

  • Page 9: Indoor Units

    '10 • SR-T-091 The functional setting The initial function setting for typical using is performed automatically by the indoor unit connected, when remote controller and indoor unit are connected. As long as they are used in a typical manner, there wiil be no need to change the initial settings. If you would like to change the initial setting marked “...

  • Page 10: Outdoor Units

    '10 • SR-T-091 Note 1: The initial setting marked “ ” is decided by connected indoor and outdoor unit, and is automatically defined as following table. Item Function No. Default Model "Auto-RUN" mode selectable indoor unit. Remote controller function02 Indoor unit without "Auto-RUN" mode Indoor unit with two or three step of air flow setting Remote controller function06...

  • Page 11: Sr-T-

    '10 • SR-T-091 Operation message How to set function Function description: Function No. Stop air-conditioner and press (SET) (MODE) setting description: buttons at the same time for over three seconds, and the "FUNCTION SET " will be displayed. Fixing button Press (SET) button.
  • Page 12 '10 • SR-T-091 12.2 Wireles kit (FDTC series : RCN-TC-24W-ER) PJA012D758 Notes : Following functions of FDTC Type-D indoor unit series are not able to be set with this wireess remote controller (RCN-TC-24W-ER). 1. Individual flap control system 2. 4-fan speed setting (PHi/Hi/Me/Lo) → 3-fan speed setting (Hi/Me/Lo) WARNING Fasten the wiring to the terminal securely and hold the cable securely so as not to apply <To change the settings>...

  • Page 13: Remote Controller

    '10 • SR-T-091 PJA012D758 Remote controller Wireless remote controller’s operable area 1 Standard reachable area of the signal Installation of the controller holder [condition] Illuminance at the receiver: 300lux (when no lighting is installed within 1m of the receiver in an ordinary office.) Caution Ceiling surface DO NOT install it on the following places...
  • Page 14 '10 • SR-T-091 12.3 Simple wired remote controller (FDTC series : RCH-E3) Notes : Following functions of Type-D indoor unit series are not able to be set with this simple wired remote controller (RCH-E3). 1. Individual flap control system (for FDTC) 2.
  • Page 15 '10 • SR-T-091 × RoHS...
  • Page 16 '10 • SR-T-091 In case of exposing cord Simple Remote Controller Installation Manual PJZ012D069 ⑴  Make certain to remove a screw on the bottom surface of the remote controller. Read together with indoor unit's installation manual. WARNING ⑴ Screw ● Fasten the wiring to the terminal securely and hold the cable securely so as not to apply unexpected stress on the terminal.
  • Page 17 '10 • SR-T-091 3. Master/ slave setting when more than one remote controller are used ⑴  Up to two remote controllers can be connected to one unit (or one group) of indoor unit. Switch Setting Function detail Slave remote controller indoor unit SW1-1 Master remote controller...

  • Page 18: Auto Restart Function

    '10 • SR-T-091 6. Function setting Each function of the remote controller and the indoor unit is automatically set to the initial setting, which is the standard use, on the occasion of connecting the remote controller with the indoor unit. In the case of the standard use, the setting change is unnecessary.
  • Page 19 '10 • SR-T-091 7. How to set functions by button operation ⑴  Stop air-conditioning, and simultaneously press AIR CON NO. and MODE buttons at the same time for over three seconds.   The function number “01” blinks in the upper right. Function number End button ⑵ Press TEMP△...

  • Page 20: Cautions

    '10 • SR-T-091 12.4 Interface kit (SC-BIKN-E) RKZ012A088 Before use, please read these Safety Precautions thoroughly Safety precautions before installation. All the cautionary items mentioned below are important safety related items to be taken Accessories included in package into consideration, so be sure to observe them at all times. Be sure to check all the accessories included in package.
  • Page 21 '10 • SR-T-091 Installation of the interface Install the interface within the range of the connection cable length (approximately 1.3m) from the indoor unit. Wiring inlet Be sure not to extend the connection cable on site. If the connection cable is extended, malfunction may occur. Fix the interface on the wall, pillar or the like.
  • Page 22 '10 • SR-T-091 Functions of CNT connector It is available to operate the air conditioning unit and to monitor the operation status with the external control unit (remote display) by sending the input/output signal through CNT connector on the indoor control PCB. 0.3 mm (Keep the distance between the relay and the CNT terminal within 2 m.)
  • Page 23 '10 • SR-T-091 Connection of wired remote controller Regarding the connection of wired remote controller, refer to the instruction manual of wired remote controller. Switch ON the DIP switch SW2-2 (Factory setting : ON) on the interface PCB. DIP suitch Caution:Wireless remote controller attached to the indoor unit can be used in parallel, after connecting the wired remote controller.
  • Page 24 '10 • SR-T-091 12.5 Super link E board (SC-ADNA-E) SL2NA-E, and SL3N-AE/BE to control...
  • Page 25 '10 • SR-T-091...
  • Page 26 Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926 Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.

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