Mitsubishi SRK35ZD-S- Manuals

13 (b) Outdoor unit Models SRC20ZD-S, 25ZD-S, 35ZD-S SRC25ZC-S, 35ZC-S Drain holes 286.4 12 50 290 49.6 43.5 850 203.1 510 136.9 476 Elogated hole (2-12 x16) 314 12 328 Terminal block Service valve (Liquid)ø6.35 (1/4'') Service valve (Gas)ø12.7 (1/2'') Groundterminal 124 34.6 20 ˚ 20 ˚ 42.7 100.3 15...

14 (4) Piping system Models SRK20ZD-S, 25ZD-S, 35ZD-S SRK25ZC-S, 35ZC-S Outdoor unit Indoor unit Room temp.sensor Heatexchanger Flare connection Heatexchangersensor Piping(Liquid)ø6.35 Check joint 4 way valve Service valve (Liquid) Flare connetion Discharge pipetemp. sensor Cooling cycle Heating cyc...

15 (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. (a) Coefficient of cooling and heat...

17 Power source 1 Phase 220/230/240V 50Hz Outdoor unit Indoor unit HEAT EXCHANGER Printed circuit board BR BL Y/GN BK WH Y OR RD RD BK WH Y BL TB TB F2 (250V 15A) F1 250V 3.15A BK G3 N-1 L-1 CNO.1 WH RD Y/GN N ZNR CNM CNE CNG CNF 52C3 52C 52C4 J 1 2 3 52C FMo EEV CM CFo SWITCHING POWER CIRCUIT CNS P...

18 LO MED HI AUTO HI POWER ECONO ON OFF AM PM HI POWER TEMP ECONO AIR FLOW CANCEL ON OFF RESERVE TIMER TIME ACL FAN SPEED ON MODE LO MED HI AUTO TIME OFF HI POWER ECONO ON OFF AM PM FAN SPEED button E a c h t i m e t h e b u t t o n i s p u s h e d , t h eindicator is switched over in turn. • The ab...

19 Unit indication section Models SRK20ZD-S, 25ZD-S, 35ZD-S, 50ZD-S (2) Unit ON/OFF button When the remote controller batteries become weak, or if the remote controller is lost or malfunctioning, this button may be used to turn the unit on and off. (a) Operation Push the button once to place the uni...

20 (4) Flap control Control the flap by AIRFLOW button on the wireless remote control. (a) Air scroll (AUTO) The flap will be automatically set to the angle of air flow best to operation. (i) Starting time of operation (c) Swing flap Flap moves in upward and downward directions continuously. (ii) Wh...

21 (c) Hot keep operation If the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the temperature ofthe indoor unit heat exchanger (detected with Th2, indoor unit heat exchanger sensor) to prevent blowing of cool wind. Note (1) Refer to the table ...

23 (v) Heating “HI POWER” operation (HI POWER button on remote controller: ON) Operation is maintained for 15 minutes with a higher blow out air temperature. ¡ Detail of operation Model SRK20ZD-S SRK25, 35ZD-S SRK50ZD-S Item SRK25, 35ZC-S SRK50ZC-S Inverter speed 100 rps 102 rps 120 rps Indoor fan H...

24 (c) Detail of control in each mode (Pattern) (i) Fuzzy operation During the fuzzy operation, the air flow and the inverter speed are controlled by calculating the difference between the room temperature setting correction temperature and the suction air temperature. (ii) Cooling thermostat operat...

25 D range C range B range A range (ii) Heating oriented dehumidifying After interrupting the compressor operation for 3 minutes (by the 3-minute timer) following the determination of heating oriented dehumidifying, the unit begins in the heating operation. If the room temperature exceeds the settin...

26 (9) Outline of automatic operation (a) Determination of operation mode The unit checks the room temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 20 seconds, determines the operation mode and the room temperature setting correction value, and then begi...

29 Notes (1) When the discharge pipe temperature is in the range of 100(90) to 125(110)ºC, the speed is reduced by 4 rps. (2) When the discharge pipe temperature is raised and continues operation for 20 seconds without changing, then the speed is reduced again by 4 rps. (3) If the discharge pipe tem...

32 1.1.5 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...

33 (1) Selection of location for installation (a) Indoor unit (i) Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (ii) A solid place where the unit or the wall will not vibrate. (iii) A place where there will be enough space for servicing. (Where sp...

35 (c) Preparation of indoor unit (i) 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. (ii) Protective taping (Protect the cable with tape at the section where the cable passes...

36 (d) Installation on indoor unit (i) 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 thelower part of the indoor unit so that the unit is fixed in position. ¡ When removing the i...

37 Service Valve(three-way valve) Charge hose(Designed specifically for R410A) Compoundpressuregauge Pressuregauge Gauge Manifold(Designed specifically for R410A) Handle Hi. Vacuum pump Vacuum pump adapter(Anti-reverse flow type)(Designed specifically for R410A) Charge hose(Designed specifically for...

39 (ii) When manipulating the remote controller mounted on a wall: Make sure that it works normally (i.e., transmission/reception signal is audible) before mounting. Notes (1) The remote controller is correctly facing the sensing element of the air conditioner when beingmanipulated. (2) The typical ...

40 1.1.6 MAINTENANCE DATA (1) Troubleshooting procedures for electrical equipment (a) 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 bef...

41 (d) Troubleshooting procedure (If the air conditioner runs) NO NO NO NO YES YES YES YES Note (1) Even in cases where only intermittent stop data are generated, the air conditioning system is normal. However, if the same protective operation recurs repeatedly (3 or more times), it will lead to cus...

42 (e) 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 lights. If the air conditioner is operated using the remote controller 3 minutes or more after the emergency stop, the trouble display ...

43 (f) 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. Ifself-diagnosis displays cannot be confirmed, it is possible to get a grasp of the conditions at the time trouble occur...

44 *3: To count the number of flashes in the service mode, count the number of flashes after the light lights up for 1.5 second initially (start signal). (The time that the light lights up for 1.5 second (start signal) is not counted in the number of flashes.) *4: When in the service mode, when the ...

45 2 Stop data Remote controller setting Fan speed switching Operation switching Displayed data Temperature setting 21 ° C 22 ° C 23 ° C 24 ° C 25 ° C 26 ° C 27 ° C 28 ° C 29 ° C 30 ° C Displays the reason for the stop (stop code) the previous time when the air conditioner was stopped by protective ...

47 Notes (1) The number of flashes when in the Service Mode do not include the 1.5 second period when the light light up at first (starting signal). (See the example shown below.) 0.5 sec. 1.5 sec. RUN light (10 s digit) TIMER light (1 s digit) 11-second interval 0.5 sec. OFF ON OFF ON • In the case...

48 (v) Room temperature sensor temperature, indoor heat exchanger sensor temperature, outdoor air temperature sensor temperature, outdoor heat exchanger sensor temperature table Units: ° C Buzzer sound (minus) TIMER light(1’s digit) RUN light(10’s digit) Yes (sounds for 0.1 second) 6 5 4 3 2 1 0 0 1...

50 Service data record form Customer Date of investigation Machine name Error code on previous occasion. Room temperature sensor temperature on previous occasion. Indoor heat exchanger sensor temperature on previous occasion. Remote controller information on previous occasion. Outdoor air temperatur...

51 (g) Inspection procedures corresponding to detail of trouble Sensor error [Broken sensor wire,connector poor connection] (Shortcircuit) (Broken wire) Current cut [Open phase on compressor outputterminal, compressor lock] YES YES NO NO YES NO ¡ Check compressor wiring visually. ¡ Check insulation ...

54 Outdoor fan motor error [Defective fan motor,defective PCB] YES YES NO NO Is connector connection good? Is voltage applied to fan motor? Defective fan motor Correct connectorconnection. Defective indoor unitPCB Phenomenon Sensor Shortcircuit Broken wire Cooling Release of continuous compressor op...

56 Printed circuit board F2 (250V 20A) WH RD U V W BK C2 S.IN R.IN Re G Th4 Th5 Th6 CNB CNE CNA CND N P Power transistor 20S EEV FMo DS CM BK WH RD Y/GN 1 2 3 ◆ Inspection of resistance v alue of disc har g e pipe sensor Remove the connector and check the resistance value. See the section of sensor ...

57 F2 (250V 15A) G3 N-1 L-1 CNO.1 FMo EEV CM CFo SWITCHING POWER CIRCUIT CNS PWB1 PWB3 PWB2 1 CNG 2 N_1 N_3 P_1 P_1 RD RD RD OR OR BK BK GR OR Y N-OUT2 GR AC.N AC.L AF_L1 AF_L2 BL BL L-OUT2 U V W WH BK DC-N DC-P CNJ CNB CND CNN CNG CNH CNH RL 1 2 3 Th4 Th5 Th6 20S Power transistor N P L N1 N2 P2 IC1...

59 1.1.7 REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL FOR AIR CONDITIONERS USING R410A (These materials are extracted from document issued by The Japan Refrigeration and Air Conditioning Industry Association) (1) Outline (a) Refrigerant R410A (i) Adoption of R410A in air conditioners In 1974, it...

61 (ii) JointsFor copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants.1) 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.Sizes of flar...

63 (ii) Flare connecting procedures and precautions 1) Make sure that the flare and union portions do not have any scar or dust, etc. 2) Correctly align the processed flare surface with the union axis. 3) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for...

64 (ii) Identification 1) Piping set A copper pipe as piping set for R410A must have a thickness as stated in Table 3 (see on page 60), and, as shown in Tables 5 and 6 (see on page 62), it also differs from R22 in flare processing and flare nut dimensions. So, it is necessary to choose a piping set ...

66 * 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. 4) The refrigerant pipe work sho...

69 (b) New installation work (when using new refrigerant piping) (i) Air purge by vacuum pump and gas leakage inspection (see Fig. 6) 1) Connect the charge hose to the outdoor unit. 1 2) Connect the charge hose to the vacuum pump adapter. 2 At this time, keep the control valves in the fully closed p...

70 6) 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 7) Quickly remove the charge hose from the service port. 6 When stopped halfway, refrigerant being cycled will be released. 8) After sec...

71 (f) 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 un...

78 (2) Range of usage & limitations (3) Exterior dimensions (a) Indoor unit Models SRK63ZE-S, 71ZE-S Indoor return air temperature(Upper, lower limits) Refrigerant line (one way) length Max. 30m SRK63ZE-S, 71ZE-S Cooling operation: Approximately 18 to 32 ° C Heating operation: Approximately 15 t...

80 (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. (a) Coefficient of cooling and heat...

82 S Indication section (a) Wireless remote control 1.2.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER (1) Operation control function by remote control switch FAN SPEED button Each time the button is pushed, the indi- cator is switched over in turn. • The above illustration shows all controls, but ...

83 (b) Wired remote control (Optional parts) The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation. Characters displayed with dots in the liquid crystal dis...

84 (2) Unit ON/OFF button When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the unit on and off. (a) Operation Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off. (b) De...

85 EXTERNAL INPUT WIRED REMOCON OPE PERMISSION CUSTOM AUTO RESTART LO TEMP DIRT PREVENT COOL ONLY HI CEIL PANEL 50/60 (4) Custom cord switching procedure If two wireless remote controls are installed in one room, in order to prevent wrong operation due to mixed signals, please modify the printed cir...

86 Corrects the starting time of next operation bycalculating the temperature difference. (Example) Heating Setting temperature Room temperature Operation starting time Time Setting time 15 min. 10 min. 5 min. earlier earlier earlier ¡ If the difference (= Setting temperature – Room tempera-ture) is...

88 (d) Defrosting operation (i) Starting conditions (Defrosting operation can be started only when all of the following conditions are met.)1) 1 After start of heating operation → When it elapsed 45 minutes.(Accumulated compressor operation time) 2 After end of defrosting operation → When it elapsed...

89 Note (1) When outdoor unit heat exchanger sensor (Th4) temperature becomes 2°C or higher, inverter command changes 70 rps to 40 rps. (iii) Ending conditions (Operation returns to the heating cycle when either one of the following is met.) 1 Outdoor heat exchanger sensor (Th4) temperature: 15ºC or...

91 (10) Outline of dehumidifying operation (a) After operating the indoor blower for 20 seconds from immediately after the start of operation, the indoor temperature is checked and, based on the result of check, the cooling oriented dehumidifying or heating oriented dehumidifying is selected. Heatin...

92 (ii) Heating oriented dehumidifying After interrupting the compressor operation for 3 minutes (by the 3-minute timer) following the determination of heating oriented dehumidifying, the unit begins in the heating operation. If the room temperature exceeds the setting temperature by 2ºC or more, th...

96 (17) Operation permission/prohibition control The air conditioner operation is controlled by releasing the jumper wire (J3) on the indoor control board and inputting the external signal into the CnT. (a) The operation mode is switched over between Permission and Prohibition by releasing the jumpe...

103 (t) Compressor lock If the motor for the compressor does not turn 1/12 revolution 0.044 seconds after it has been started, it is determined that a compressor lock has occurred and the compressor is stopped. (u) Outdoor fan motor protection If the outdoor fan motor has operated at 75rpm or under ...

105 (1) Selection of location for installation (a) Indoor unit (i) Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (ii) A solid place where the unit or the wall will not vibrate. (iii) A place where there will be enough space for servicing. (Where s...

107 (c) Preparation of indoor unit (i) Mounting of connecting wires 1) Open the air inlet panel. 2) Remove the lid. 3) Remove the wiring clamp. 4) Connect the connecting wire securely to the terminal block. 1 Connect the connection wire securely to the terminal block. If the wire is not affixed comp...

108 [Drain hose changing procedures] 1. Remove the drain hose. ¡ R e m o v e t h e d r a i n h o s e ,making it rotate. Since this air conditioner has been designed to collect dew dropson the rear surface to the drain pan, do not attach the powercord above the gutter. Gutter Pipe accommodation secti...

109 (3) Installation of outdoor unit (a) Installation of outdoor unit (i) Make sure that the unit is stable in installation. Fix the unit to stable base. (ii) When installing the unit at a higher place or where it could be toppled by strong winds, secure the unit firmly with foundationbolts, wire, e...

111 (d) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (e) Make sure that drain flows properly. (f) Standard operation data Model Item SRK63ZE-S SRK71ZE-S Cooling – – Heating 2.5~2.7 2.6~2.8 Cooling 0.8~1.0 0.7~0.9 Heating – – Cooling 12~14 12~14 Heatin...

112 (ii) When manipulating the remote control mounted on a wall: Make sure that it works normally (i.e., transmission/reception signal is audible) before mounting. Notes (1) T h e r e m o t e c o n t r o l i s c o r r e c t l y f a c i n g t h e sensing element of the air conditioner when beingmanip...

114 2) Recessed fitting a) The Electrical box and remote control (shield wire must be use in case of extension) arefirst embedded. (b) Installation of wired remote control (Optionalparts) (i) Selection of installation location Avoid the following locations1) Direct sunlight.2) Close to heating devic...

115 (c) Setting functions using the wired remote control (i) The default settings of this unit's functions are as follows: If you want to charge a setting, follow the procedure found in the installation manual and set to your desired setting. For the method of setting, please refer to the installati...

116 (ii) Function setting method 1) Stop the air conditioner 2) Press the SET and MODE buttons simultaneously for 3 seconds or longer. The screen display will be switched as follows: “ SELECT ITEM” “ SET" “FUNCTION SET ” 3) Press the SET button. The unit will enter the function setting mode. The...

117 When “I/U FUNCTION ” is selected. 1 The screen display will be switched as follows:“ I/U SELECT” “ SET” “I/U No.00” (blinking) 2 Press either or button. Select the indoor unit number that you want to change settings. If only one indoor unit is connected, the indoor unitnumber will not charge, so...

118 12 Function No. A (Example) If the upper limit is set at 28˚C Function Contents B Setting Contents C TEMP RANGE SET DISP CHANGE NO DISP CHANGE Control Contents The remote control’s display and sent data upper limit changes to 28 ° C. The remote control’s display upper limit remains at 30ºC and o...

119 (d) SUPER LINK ADAPTER (SC-AD-E) (i) Functions 1) Transmits the settings from the Super link option to the indoor units. 2) Returns the priority indoor unit data in response to a data request from the Super link option. 3) Inspects the error status of connected indoor units and transmits the ins...

124 *3: To count the number of flashes in the service mode, count the number of flashes after the light lights up for 1.5 second initially (start signal). (The time that the light lights up for 1.5 second (start signal) is not counted in the number of flashes.) *4: When in the service mode, when the...

127 Notes (1) The number of flashes when in the Service Mode do not include the 1.5 second period when the lights light up at first (starting signal). (See the example shown below.) 0.5 sec. 1.5 sec. RUN light (10’s digit) TIMER light (1’s digit) 11-second interval 0.5 sec. OFF ON OFF ON • In the ca...

129 (vi) Discharge pipe temperature table Units: ° C Buzzer sound (minus) TIMER light(1’s digit) RUN light(10’s digit) Yes (sounds for 0.1 second) 3 2 1 0 0 1 2 3 4 5 6 7 -60 -40 -20 0 20 40 60 80 100 120 140 0 1 2 3 4 5 6 7 8 9 -62 -42 -22 -2 2 22 42 62 82 102 122 142 -64 -44 -24 -4 4 24 44 64 84 1...

131 (g) Inspection procedures corresponding to detail of trouble Sensor error [Broken sensor wire,connector poor connection] (Shortcircuit) (Broken wire) Is connector connection good? YES YES NO NO Replace PCB. Correct connection. Replace sensor. Is sensor resistance value good? ◆ S e n s o r t e m ...

134 Outdoor fan motor error [Defective fan motor, connectorpoor connection, defective PCB] Is connector connection good? YES NO NO Is the output of the outdoor unit’sprinted circuit board normal? Normal NO YES YES Correct connector connection Is DC fan motor resistance value good? Replace outdoor PC...

135 Operationmode Heat exchangersensor Outdoor airtemperature sensor Discharge pipesensor Compressor overload protection is disabled.(Can be operated.) (i) Checking the indoor electrical equipment (i) Indoor unit circuit board check procedure (ii) Outdoor unit Phenomenon Sensor Shortcircuit Broken w...

137 c Inspection of resistance value of dischargepipe sensor. Remove the connector and check the resis- tance value. See the section of sensor char- acteristics on page 131. c Inspection of electronic e xpansion valve To test if there is voltage. (Voltage is only applied to the electronic expansion ...

138 Output voltage (ACV) (Example)Self-diagnosis display : Flashes 2 times Measure in this section Operation SW ON 8 ~ 10 sec. 0 1 ◆ Power transistor inspection procedure [Use a tester with a needle indicator for the inspection. (Do not use a digital tester. Check in the AC 300 volt range.)] 1) If t...

139 (2) Servicing (a) 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 ...