Related Manuals for Mitsubishi SRK25ZD-S
Summary of Contents for Mitsubishi SRK25ZD-S
- Page 1 Manual No. ’04 . SRK-T . 039 TECHNICAL MANUAL Collection data INVERTER WALL MOUNTED TYPE ROOM AIR-CONDITIONER ( Split system, air to air heat pump type ) Alternative refrigerant R410A use models SRK25ZD-S, 35ZD-S, 50ZD-S...
-
Page 2: Table Of Contents
CONTENTS 1. GENERAL INFORMATION ................1 Specific features ..................1 How to read the model name ..............1 2. SELECTION DATA..................2 Specifications ..................2 Range of usage & limitations ............... 5 Exterior dimensions ................5 Piping system ..................7 Selection chart .................. -
Page 3: General Information
1.1 Specific features The “Mitsubishi Daiya” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling or heating equipment with opera- tion control switch and the outdoor unit is composed of condensing unit with compressor. -
Page 4: Selection Data
SELECTION DATA 2.1 Specifications Model SRK25ZD-S (Indoor unit) SRC25ZD-S (Outdoor unit) Model SRK25ZD-S SRC25ZD-S Item Cooling capacity 2500 Heating capacity 3400 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 0.62 Running current (Cooling) 3.1/3.0/2.9 Heating input 0.94 Running current (Heating) 4.5/4.3/4.1... - Page 5 Model SRK35ZD-S (Indoor unit) SRC35ZD-S (Outdoor unit) Model SRK35ZD-S SRC35ZD-S Item Cooling capacity 3500 Heating capacity 4500 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 1.09 Running current (Cooling) 5.4/5.2/5.0 Heating input 1.24 Running current (Heating) 5.9/5.7/5.4 Inrush current 5.9/5.7/5.4 Cooling: 3.21 Heating: 3.63 Sound level Hi 41, Me 32, Lo 23...
- Page 6 Model SRK50ZD-S (Indoor unit) SRC50ZD-S (Outdoor unit) Model SRK50ZD-S SRC50ZD-S Item Cooling capacity 5000 Heating capacity 6300 Power source 1 Phase, 220/230/240V, 50Hz Cooling input 1.66 Running current (Cooling) 7.6/7.3/7.0 Heating input 1.96 Running current (Heating) 9.0/8.6/8.2 Inrush current 9.0/8.6/8.2 Cooling: 3.01 Heating: 3.21 Sound level Hi 48, Me 42, Lo 26...
-
Page 7: Range Of Usage & Limitations
Voltage at starting Min. 85% of rating Frequency of ON-OFF cycle Max. 10 times/h ON and OFF interval Max. 3 minutes 2.3 Exterior dimensions (1) Indoor unit Models SRK25ZD-S, 35ZD-S, 50ZD-S Unit: mm Piping hole right(left) Terminal block 117.5 117.5 216.5 216.5 148.5... - Page 8 (2) Outdoor unit Models SRC25ZD-S, 35ZD-S Unit: mm Drain holes 264.5 404.5 17.8 2-16 x12 Terminal block 61.9 Service valve (Liquid) 139.3 33.3 Flare connection ø6.35 (1/4") Service valve (Gas) Flare connecting ø9.52 (3/8") Model SRC50ZD-S 286.4 Drain hole 203.1 136.9 Elogated hole (2-12 x16)
-
Page 9: Piping System
2.4 Piping system Models SRK25ZD-S, 35ZD-S Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Flare connecting Service valve temp. thermistor (Gas) Piping Check joint (Gas) ø9.52 4 way valve Accumulator Room temp. Discharge temp. Heat Heat thermistor thermistor... -
Page 10: Selection Chart
2.5 Selection chart Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be obtained in the following way. Net capacity = Capacity shown on specification Correction factors as follows. (1) Coefficient of cooling and heating capacity in relation to temperatures Cooling Heating... - Page 12 Outdoor unit Indoor unit Power source 1 Phase 220/230/240V 50Hz F2 (250V 15A) Y/GN Y/GN N-1 L-1 CNO.1 HEAT EXCHANGER 52C4 52C3 PWB1 N-OUT2 L-OUT2 Printed circuit board 250V SWITCHING 3.15A POWER CIRCUIT AC.N AC.L AF_L1 PWB2 AF_L2 DC-P DC-N Color symbol IC12 Black...
-
Page 13: Outline Of Operation Control By Microcomputer
OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch Remote controller Models All models S Operation section FAN SPEED button OPERATION MODE select button Each time the button is pushed, the Each time the button is pushed, the indicator is switched over in turn. -
Page 14: Back-Up Switch
Unit indication section Models All models RUN (HOT KEEP) light (green) • Illuminates during operation. • Flashes at air flow stop due to the ‘HOT KEEP’. TIMER light (yellow) Illuminates during TIMER operation. HI POWER light (green) Illuminates during HI POWER operation. ECONOMY light (orange) Illuminates during ECONOMY operation. -
Page 15: Flap Control
4.4 Flap control Control the flap by AIRFLOW button on the wireless remote control. (1) Air scroll (AUTO) The flap will be automatically set to the angle of air flow best to operation. (a) Starting time of operation During cooling and During heating dry operation operation... -
Page 16: Outline Of Heating Operation
If the speed obtained with the fuzzy calculation drops below -24 rps during the heating fuzzy operation, the operation changes to the heating thermostat operation. ¡ Detail of operation Model SRK25ZD-S, 35ZD-S SRK50ZD -S Item 10 rps [10sec.] → 0rps [Comp. stopped] Inverter speed 0rps [Comp. - Page 17 ¡ Hot keep M mode [During HI POWER operation (for 15 min.)] (25, 35ZD only) 9th speed (25, 35ZD only) 8th speed 7th speed ¡ Values of A, B Indoor fan 6th speed 5th speed At 0 rps command 4th speed Other than 0 rps command 3rd speed...
-
Page 18: Outline Of Cooling Operation
¡ 50 type Hot keep Indoor unit Corresponding to speed Indoor fan Flashing Operation lamp Hot keep (Hot keep) Outdoor unit Fuzzy calculated 70 rps Inverter value command 2nd speed 2nd speed Corresponding Outdoor fan to speed 4-way valve 75 sec. Final defrost operation Defrost operation 60 sec. -
Page 19: Outline Of Dehumidifying Operation
(2) Air flow selection (a) Speed of inverter changes within the range of selected air flow. Model SRK25ZD-S SRK35ZD-S SRK50ZD-S Air flow selection Inverter command speed 20~62rps 20~70rps 15~84rps Auto Air flow Depends on inverter command speed. Inverter command speed... - Page 20 (2) Outline of control (a) Cooling oriented dehumidifying Room temperature is checked at 5-minute intervals after selecting the cooling or heating oriented dehumidifying in order to determine the operation range. Note (1) Figures in the parentheses Operation range ( D ) ( C ) ( C ) ( B )
-
Page 21: Outline Of Automatic Operation
(1) The set temperature is raised by 1.5ºC (0.5ºC every one hour) at cooling operation and lowered by 2.5ºC (Steps of 1ºC, 1ºC and 0.5ºC every one hour) at heating operation to continue the operation with the following contents. (2) Detail of operation Model SRK25ZD-S SRK35ZD-S SRK50ZD-S Item... - Page 22 (2) Indoor fan motor protection When the air conditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300 rpm or under for more than 30 seconds, the unit enters first in the stop mode and then stops the entire system. Timer lamp illuminates simultaneously and the operation lamp flashing 6 times at each 8-second.
- Page 23 (7) Inching prevention When the compressor goes into the thermo operation within 10(5) minutes since operation start or becomes various dehumidifying operations, the operation is continued with the command speed of 20(15) rps forcibly. Note (1) Values in ( ) are for Type 50. (8) Current safe (a) Purpose: Current is controlled not to exceed the upper limit of the setting operation current.
- Page 24 (13) Compressor overheat protection (a) Purpose: It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the compressor overheat. (b) Detail of operation 1) Speeds are controlled with temperature detected by the thermistor mounted on the discharge pipe. (Example) Fuzzy 4 rps After lapse of 3 min.
- Page 25 0 rps. [When 0 rps is commanded from the indoor unit controller, or when an outdoor protective function is actuated] (b) Detail of operation SRK25ZD-S, 35ZD-S When stopped by indoor unit controller When stopped or reset by outdoor unit protective function...
- Page 26 SRK50ZD-S When stopped by indoor unit controller When stopped or reset by outdoor unit protective function Function Operation Heating, heating Cooling, cooling Heating, heating Cooling, cooling oriented dehumidifying oriented dehumidifying oriented dehumidifying oriented dehumidifying 2 min. 3 min. 3 min. (Command 55 sec.
-
Page 27: Application Data
5. APPLICATION DATA SAFETY PRECAUTIONS ¡ Please read these “Safety Precautions” first then accurately execute the installation work. ¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the WARNING section. -
Page 28: Selection Of Location For Installation
(ii) Design the base higher than possible snow deposit. height (3) Limitations for one way piping length and vertical height difference. Model SRK25ZD-S SRK50ZD-S Item SRK35ZD-S One way piping length (R) 15 m 25 m Outdoor... -
Page 29: Installation Of Indoor Unit
5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board Look for the inside wall structures (Intersediate support or pillar and firaly install the unit after level surface has been Adjustment of the installation board in the horizontal checked.) direction is to be conducted with four screws in a temporary tightened state. - Page 30 (3) Preparation of indoor unit (a) Mounting of connecting wires 1) Remove the lid (R). 2) Remove the terminal cover. 3) Remove the wiring clamp. 4) Connect the connecting wire securely to the terminal block. Terminal block Use cables for interconnection wiring to avoid loosening of the wires.
-
Page 31: Installation Of Outdoor Unit
(4) Installation on indoor unit (a) Install the indoor unit on the mounting plate. Hook the upper part of the indoor unit on the stoppers disposed at the upper part of the mounting plate and lightly push the lower part of the indoor unit so that the unit is fixed in position. ¡... - Page 32 (2) Connection of refrigerant piping Indoor unit side Outdoor unit side ¡ Connect firmly gas and liquid side ¡ Connect firmly gas and liquid side pipings by Torque wrench. pipings by Torque wrench. Spanner (for fixing the piping) Torque wrench ¡...
-
Page 33: Test Run
(b) It is very important to be careful of above when plugging in the unit to an already furnished electrical outlet. (4) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (5) Make sure that drain flows properly. (6) Standard operation data (220/230/240V) Model SRK25ZD-S SRK35ZD-S SRK50ZD-S Item Cooling –... -
Page 34: Precautions For Wireless Remote Controller Installation And Operation
5.6 Precautions for wireless remote controller installation and operation (1) Wireless remote controller covers the following distances: (a) When operating facing the air conditioner: Notes (1) The remote controller is correctly facing the sensing element of the air conditioner when being manipulated. -
Page 35: Maintenance Data
6. MAINTENANCE DATA 6.1 Troubleshooting procedures for electrical equipment (1) Cautions 1 If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. When working on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an outdoor unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after discharging this electrical charge (to DC 10 V or lower). - Page 36 (4) Troubleshooting procedure (If the air conditioner runs) Confirm the contents of the customer complaint. The cause of the trouble can be specifically identified. Eliminate the cause of the trouble and perform an Check the self-diagnosis display. operation check. See pages 35. Is an error code displayed by Using the Service Mode, access the self-diagnosis the self-diagnosis function?
- Page 37 (5) Self-diagnosis table When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing of display lamps. If the air conditioner is operated using the remote controller 3 minutes or more after the emergency stop, the trouble display stops and the air conditioner resumes operation.
- Page 38 (6) Service mode (Trouble mode access function) This air conditioner is capable of recording error displays and protective stops (service data) which have occurred in the past. If self-diagnosis displays cannot be confirmed, it is possible to get a grasp of the conditions at the time trouble occurred by checking these service data.
- Page 39 *3: To count the number of flashes in the service mode, count the number of flashes after the lamp lights up for 1.5 second initially (start signal). (The time that the lamp lights up for 1.5 second (start signal) is not counted in the number of flashes.) •...
-
Page 40: Remote Controller Setting
2 Stop data Remote controller setting Displayed data Temperature Operation Fan speed switching switching setting Cooling 21°C Displays the reason for the stop (stop code) the previous time when the air conditioner was stopped by protective stop control. 22°C Displays the reason for the stop (stop code) 2 times previous when the air conditioner was stopped by protective stop control. 23°C Displays the reason for the stop (stop code) 3 times previous when the air conditioner was stopped by protective stop control. - Page 41 Number of flashes when in service mode Stop code Error content Auto Error Occurrence conditions Cause Timer recovery display lamp Error code lamp Minor category Major category (10’s digit) (1’s digit) Current Overcharge 4 time 1 time Cooling overload 1 When there is a current safe stop in overload 1 mode safe Compressor lock...
- Page 42 Notes (1) The number of flashes when in the Service Mode do not include the 1.5 second period when the lamps light up at first (starting signal). (See the example shown below.) • In the case of current safe (heating CT1) (example: stop code “32”) The run lamp (10’s digit) flashes 3 times and the timer lamp (1’s digit) flashes 2 times.
- Page 43 (v) Indoor temperature sensor temperature, indoor heat exchanger sensor temperature, outdoor temperature sensor temperature, outdoor liquid pipe sensor temperature table Units: °C Timer lamp (1’s digit) Run lamp (10’s digit) Buzzer sound (minus) (sounds for 0.1 second) (does not sound) * If no data are recorded (error code is normal), the display for each sensor becomes as shown below.
- Page 44 (vi) Discharge pipe temperature table Units: °C Timer lamp (1’s digit) Run lamp (10’s digit) Buzzer sound (minus) (sounds for 0.1 second) (does not sound) * If no data are recorded (error code is normal), the display for each sensor becomes as shown below. Sensor value displayed when the error code is normal Sensor name Discharge pipe sensor temperature...
- Page 45 Service data record form Customer Model Date of investigation Machine name Content of complaint Remote controller settings Display results Display content Content of displayed data Temperature setting Operation switching Fan speed switching Buzzer (Yes/No.) Run lamp (Times) Timer lamp (Times) Error code on previous occasion.
-
Page 46: Thermistor Error
(7) Inspection procedures corresponding to detail of trouble [Broken thermistor wire, Thermistor error connector poor connection] Is connector connection good? Correct connection. Is thermistor resistance value good? Replace thermistor. Replace PCB. Discharge pipe thermistor temperature characteristics Thermistor temperature characteristics (Room temperature, indoor unit heat Temperature (˚C) Resistance (kΩ) Temperature (˚C) -
Page 47: Outdoor Unit Error
[Broken power transistor Outdoor unit error broken compressor wire] Is output voltage applied to all 3 Defective inverter phases of power transistor? (Refer to page 50 for details) Is compressor wiring connected Connect securely. securely? Inspect compressor. [Gas shortage, defective discharge Compressor overheat pipe thermistor] Connector connection check, resistance... - Page 48 [Wiring error including power cable, defective indoor/ Serial signal transmission error outdoor unit PCB, error on power supply system] Does error persist after power Trouble by transient cause, not unit trouble. reset? Correct improper wire connection on indoor/ Is there any wrong connection on outdoor unit.
- Page 49 [Defective fan motor, Outdoor fan motor error defective PCB] Correct connector Is connector connection good? connection. Defective indoor unit Is voltage applied to fan motor? Defective fan motor (8) Phenomenon observed after shortcircuit, wire breakage on thermistor. (a) Indoor unit Phenomenon Operation Thermistor...
- Page 50 (9) How to make sure of remote controller (10) Inspection procedures of indoor electrical equipment Is fuse (3.15A) blown? Replace fuse. Is remote Remote controller controller defects normal? Is voltage applied between terminals 1~2 on terminal Replace PCB. block? (AC 220/230/240V) Again pushing operating switch Is DC 0~12V detected between...
-
Page 53: Servicing
6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities..noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R410A is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging. -
Page 54: Refrigerant Piping Installation/Servicing Manual
REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL FOR AIR CONDITONERS USING R410A (These materials are extracted from document issued by The Japan Refrigeration and Air Conditioning Industry Association) 7.1 Outline 7.1.1 Refrigerant R410A (1) Adoption of R410A in air conditioners In 1974, it was pointed out that the ozone layer in the upper stratosphere (about 20 ~ 40 km above ground) might have been damaged by the ozone depleting substances such as CFC (chlorofluorocarbon) and HCFC (hydrochlorofluorocarbon). -
Page 55: Refrigerant Piping Installation
(3) Lubricating oils for R410A As the lubricating oils for R22, mineral oils, alkylbenze synthetic oils, etc. have so far been used. As R410A features less solubility with these conventional lubricating oils such as mineral oils, the lubricating oils tend to stay within the refrigeration cycle. As the lubricating oils highly soluble with R410A, ester, ethereal and other synthetic oils are available. - Page 56 (2) Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used.
- Page 57 d) Flare processing øD Make certain that a clamp bar and copper pipe have been cleaned. By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conventional flare tool. Flare processing dimensions differ according to the type of flare tool. Be careful. When using a conventional flare tool, be sure to secure “dimension A”...
-
Page 58: Storage Of Piping Materials
Table 8. Flare and flare nut dimensions for R22 [unit: mm] Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.2 16.0 12.9 15.88 19.4 19.0 16.0 (2) Flare connecting procedures and precautions a) Make sure that the flare and union portions do not have any scar or dust, etc. - Page 59 (2) Identification a) Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 (see on page 53), and, as shown in Tables 5 and 6 (see on page 55), it also differs from R22 in flare processing and flare nut dimensions. So, it is necessary to choose a piping set suitable for R410A.
- Page 60 (3) Flux a) Reasons for the use of flux • By removing the oxide film and any foreign matter on the metal surface, it assists the flow of brazing filler. • In the brazing process, it prevents the metal surface from being oxidized. •...
-
Page 61: Installation, Removal And Servicing
Reducing valve Flow meter Stop valve From the nitrogen cylinder Piping Nitrogen gas Rubber plug for sealing Fig.5 Prevention of oxidation during brazing * Cautions during brazing 1 General cautions 1) The brazing strength should be high as required. 2) After operation, airtightness should be kept under a pressurized condition. 3) During brazing do not allow component materials to become damaged due to overheating. - Page 62 (1) Tools exclusive for R410A a) Gauge manifold • As R410A is characterized by high pressure, conventional tools cannot be used. Table 11. Differences between conventional high/low pressure gauges and those for R410A Conventional gauges Gauges exclusive for R410A High pressure -0.1~3.5MPa -0.1~5.3MPa gauge (red)
- Page 63 e) Flare tool (clutch type) • A flare tool for R410A is provided with a large clamp bar receiving hole so that the projection of the copper pipe from the clamp bar can be set at 0~0.5 mm in flare processing, and also features higher spring strength for increased expansion pipe torque.
- Page 64 7.3.2 New installation work (when using new refrigerant piping) (1) Air purge by vacuum pump and gas leakage inspection (see Fig. 6) a) Connect the charge hose to the outdoor unit. 1 b) Connect the charge hose to the vacuum pump adapter. 2 At this time, keep the control valves in the fully closed position.
- Page 65 f) After charging liquid refrigerant into the air conditioner by closing the charging valve, stop operation by fully closing the gauge manifold’s valve Lo. 2 5 g) Quickly remove the charge hose from the service port. 6 When stopped halfway, refrigerant being cycled will be released. h) After securing the caps on the service port and control valve, check the caps’...
-
Page 66: Refrigerant Recovery
7.3.6 Refrigerant recharging at servicing When it becomes necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. (For details, see the instruction manual prepared by the equipment manufacturer) 1) Connect the charge hose to the outdoor unit’s service port. 2) Connect the charge hose to the vacuum pump adapter. - Page 67 (4) Recovering procedures a) According to the instructions for handling the refrigerant recovering equipment (described in the attached instruction manual), operate the equipment to recover refrigerant. b) During the operation, take care of the following cautions. 1 Ascertain that the refrigerant recovering equipment is running as required and always monitor the state of operation so that adequate steps can be taken in an emergency.
- Page 68 b) Charge hose (pressure resistant hose for fluorocarbon) and packing • It is 1/4B in thickness and available in various lengths, etc. • Use a hose whose pressure resisting performance is higher than 5.2 MPa (52 kg/cm • Generally, a setting fixture is provided only on one end. (4) Gauge manifold Hose Setting...
- Page 69 INVERTER WALL MOUNTED TYPE ROOM AIR-CONDITIONER Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926 No.044(1.1A) RO...