Mitsubishi Electronics PEAD-A42AA manual

SERVICE MANUAL <indoor unit> Service ref. Models PEAD-A24AA PEAD-A30AA PEAD-A36AA PEAD-A42AA TM 1. SAFETY PRECAUTION ····························· 2 2. PART NAMES AND FUNCTIONS ·············· 3 3. SPECIFICATION ········································ 5 4. FAN [...]

2 SAFETY PRECA UTION 1 1-1. AL W A YS OBSER VE FOR SAFETY Cautions for units utilising refrigerant R410A Use new refrigerant pipes. Make sure that the inside and outside of refrige- rant piping is clean and it has no contamination such as sulfur hazardous for use, oxides, dirt, shaving particles, etc. In addition, use pipes with specified thickness[...]

3 Gravimeter Unit [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. T ool name Specifications 1 Gauge manifold · Only for R410A · Use the existing fitting specifications. (UNF1/2) · Use high-tension side pressure of 5.3MPa · G or over . 2 Charge hose · Only for R410A · Use pressure performance of 5.09[...]

4 ° F ° C ° F ° C ERROR CODE AFTER TIMER TIME SUN MON TUE WED THU FRI SA T ON OFF Hr AFTER FIL TER FUNCTION ONL Y1Hr . WEEKL Y SIMPLE AUTO OFF P AR-21MAA ON/OFF FIL TER CHECK OPERA TION CLEAR TEST TEMP . MENU BACK DA Y MONITOR/SET CLOCK ON/OFF Display Section For purposes of this explanation, all parts of the display are shown as lit. During ac[...]

5 Service Ref. Power supply (phase, cycle, voltage) Max. Fuse Size Min. Circuit Ampacity A A External finish Heat exchanger Fa n F an (drive) × No . F Fan motor an motor output kW F.L.A Airflow (Low-Mid-High) m 3 /min (CFM) External static pressure Pa (in.WG) Operation control & Thermostat Sound pressure level (Low-Mid-High) dB (A) Field dra[...]

6 Service Ref. Power supply (phase, cycle, voltage) Max. Fuse Size Min. Circuit Ampacity A A External finish Heat exchanger Fa n F an (drive) × No . F Fan motor an motor output kW F.L.A Airflow (Low-Mid-High) m 3 /min (CFM) External static pressure Pa (in.WG) Operation control & Thermostat Sound pressure level (Low-Mid-High) dB (A) Field dra[...]

7 0 [0] 10 [0.040] 20 [0.080] 30 [0.120] 40 [0.161] 50 [0.201] 60 [0.241] Airflow rate (m 3 /min)[cfm] External static pressure (Pa)[in.WG] 10 [353] 15 [530] 20 [706] 25 [883] 30 [1059] 0 [0] 50 [0.201] 100 [0.401] 150 [0.602] Airflow rate (m 3 /min)[cfm] External static pressure (Pa)[in.WG] 10 [353] 15 [530] 20 [706] 25 [883] 30 [1059] 0 [0] 10 [0[...]

8 0 [0] 50 [0.201] 100 [0.401] 150 [0.602] Airflow rate (m 3 /min)[cfm] External static pressure (Pa)[in.WG] 10 [353] 15 [530] 20 [706] 25 [883] 30 [1059] 0 [0] 10 [0.040] 20 [0.080] 30 [0.120] 40 [0.161] 50 [0.201] 60 [0.241] 70 [0.281] Airflow rate (m 3 /min)[cfm] External static pressure (Pa)[in.WG] 10 [353] 15 [530] 20 [706] 25 [883] 30 [1059] [...]

9 0 [0] 50 [0.201] 100 [0.401] 150 [0.602] Airflow rate (m 3 /min)[cfm] External static pressure (Pa)[in.WG] 0 [0] 50 [0.201] 100 [0.401] 150 [0.602] Airflow rate (m 3 /min)[cfm] External static pressure (Pa)[in.WG] 0 [0] 10 [0.040] 20 [0.080] 30 [0.120] 40 [0.161] 50 [0.201] 60 [0.241] 70 [0.281] Airflow rate (m 3 /min)[cfm] External static pressu[...]

10 0 [0] 50 [0.201] 100 [0.401] 150 [0.602] Airflow rate (m 3 /min)[cfm] External static pressure (Pa)[in.WG] 0 [0] 10 [0.040] 20 [0.080] 30 [0.120] 40 [0.161] 50 [0.201] 60 [0.241] 70 [0.281] Airflow rate (m 3 /min)[cfm] External static pressure (Pa)[in.WG] 15 [530] 20 [706] 25 [883] 30 [1059] 35 [1236] 40 [1412] 45 [1589] Airflow rate (m 3 /min)[[...]

11 0 [0] 5 [0.020] 10 [0.040] 15 [0.060] Airflow rate (m 3 /min)[cfm] External static pressure (Pa)[in.WG] 0 [0] 10 [353] 20 [706] 30 [1059] 40 [1412] A24,30 A36,42 PEAD-A24, 30, 36,42AA Air filter 208-230V 60Hz[...]

12 SOUND PRESSURE LEVELS 5 5-1. Sound pressure level Measurement location 2m 1m Aux. duct 1.5m test unit 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 63 125 250 500 1k 2k 4k 8k NC-60 NC-50 Approximate minimum audible limit on continuous noise NC-40 Octave band center frequencies (Hz) NC-20 NC-30 High Middle Low 0.0 5.0 1[...]

13 PEAD-A30AA 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 63 125 250 500 1k 2k 4k 8k NC-60 NC-50 Approximate minimum audible limit on continuous noise NC-40 Octave band center frequencies (Hz) NC-20 NC-30 High Middle Low 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 63 125 250 500 1k 2k 4k 8k [...]

14 PEAD-A36AA 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 63 125 250 500 1k 2k 4k 8k NC-60 NC-50 Approximate minimum audible limit on continuous noise NC-40 Octave band center frequencies (Hz) NC-20 NC-30 High Middle Low 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 63 125 250 500 1k 2k 4k 8k [...]

15 PEAD-A42AA 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 63 125 250 500 1k 2k 4k 8k NC-60 NC-50 Approximate minimum audible limit on continuous noise NC-40 Octave band center frequencies (Hz) NC-20 NC-30 High Middle Low 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 63 125 250 500 1k 2k 4k 8k [...]

16 6 OUTLINES & DIMENSIONS INDOOR UNIT PEAD-A24, 30, 36, 42AA 3-ø2.9(1/8) mounting hole Air filter Refrigerant piping flare connection (liquid) Liquid pipe Gas pipe ø9.52 (3/8) ø15.88 (5/8) Fresh air intake ø100(3-15/16) knock out hole A Model 1400 1100 PEAD-A24, 30AA PEAD-A36, 42AA G F BCD E 1000 14 1360 1500 1454 1154 1060 11 1200 1300 13[...]

17 7 WIRING DIA GRAM PEAD-A24, 30, 36, 42AA 1 3 MS 3 ~ 1 2 4 3 M 1 ~ 4 5 6 71 123 2 1 2 1 3 4 1 2 35 1 1 2 1 3 5 1 1 2 4 3 2 1 5 4 2 3 2 1 3 2 14 2 1 4 INSIDE SECTION OF CONTROL BOX I.B. P.B. NOTE:1.Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing. 2.Indoor and outdoor connecting wire[...]

18 8 REFRIGERANT SYSTEM DIA GRAM PEAD-A24, 30, 36, 42AA Thermistor TH2 Pipe temperature(Liquid) Distributor with strainer (#50) Thermistor TH5 (Cond./ Eva.temperature) Thermistor TH1 (Room temperature) Refrigerant flow in cooling Refrigerant flow in heating Strainer (#50) Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Refrige[...]

19 *Ref er to the Installation Manual f or function settings. By setting the Mode No . 23 in the Function T able in section 9-1 to 2 and using CN4Y on the optional par ts P A C-YU25HT , the f ollowing patterns of fan control will become possib le when [DEFROST] or [ERR OR] is display ed. F an control patterns when [DEFROST] or [ERROR] is displa y e[...]

20 For rela y X use the specifications given below Operation coil Rated voltage: 12VDC Power consumption: 0.9W or less * Use the diode that is recommended by the relay manuf acturer at both ends of the rela y coil. The length of the electrical wiring for the P AC-YU25HT is 2 meters (6-1/2 ft.) To extend this length, use sheathed 2-core cable. Contr[...]

21 10 TR OUBLESHOO TING Lead wires 10-1. CA UTIONS ON TROUBLESHOO TING (1) Before tr oubleshooting, check the f ollowings: 1 Check the po wer supply v oltage. 2 Check the indoor/outdoor connecting wire f or mis-wiring. (2) T ake care the f ollowings during servicing. 1 Bef ore ser vicing the air conditioner , be sure to turn off the remote controll[...]

22 • If the unit cannot be operated properly after the test run has been performed, refer to the following table to remove the cause. Symptom Cause Wired remote controller LED 1, 2 (PCB in outdoor unit) On the wireless remote controller with condition above, following phenomena take place. • No signals from the remote controller are accepted. ?[...]

23 • If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove th e cause. On the wireless remote controller with conditions above, following phenomena takes place. • No signals from the remote controller are accepted. • OPE lamp is blinking. • The buzzer makes a short ping s[...]

24 Indicates whether control power is supplied. Make sure that this LED is always lit. Indicates whether power is supplied to the remote controller. This LED lights only in the case of the indoor unit which is connected to the outdoor unit refrigerant address “0”. Indicates state of communication between the indoor and outdoor units. Make sure [...]

25 10-3. SELF-DIA GNOSIS A CTION T ABLE Note: Ref er to the manual of outdoor unit f or the details of display such as F , U, and other E. Error Code Abnormal point and detection method Cause Countermeasure P1 Room temperature thermistor (TH1) 1 The unit is in three-minute resume prev ention mode if short/open of thermistor is detected. Abnormal if[...]

26 Error Code Abnormal point and detection method Cause Countermeasure P6 Freezing/overheating pr otection is working 1 F reezing protection (Cooling mode) The unit is in six-minute resume pre vention mode if pipe <liquid or condenser/ev ap- orator> temperature sta ys under -15 : [5˚F] for three min utes after the compressor star ted. Abnor [...]

27 Error Code Abnormal point and detection method Cause Countermeasure P9 Abnormality of pipe temperature ther- mistor / Condenser-Ev aporator (TH5) 1 The unit is in three-minute resume pro- tection mode if shor t/open of thermistor is detected. Abnor mal if the unit does not get back to normal within three min- utes. (The unit retur ns to normal o[...]

28 E6 1 Contact failure , shor t circuit or , mis-wiring (converse wiring) of indoor/outdoor unit connecting wire 2 Defectiv e transmitting receiving circuit of indoor controller board 3 Defectiv e transmitting receiving circuit of indoor controller board 4 Noise has entered into indoor/ outdoor unit connecting wire. ∗ Check LED displa y on the o[...]

29 10-4. TROUBLESHOO TING BY INFERIOR PHENOMENA Note: Ref er to the manual of outdoor unit f or the detail of remote controller . Phenomena Cause Countermeasure (1)LED2 on indoor controller boar d is off. • When LED1 on indoor controller board is also off. 1 P ower supply of r ated voltage is not supplied to out- door unit. 2 Defectiv e outdoor c[...]

CND P ow er supply voltage (208 - 230V AC) CNMF Fan motor output 1 - 4: 310 - 340 VDC 5 - 4: 15 VDC 6 - 4: 0 - 6.5 VDC 7 - 4: Stop 0 or 15 VDC Run 7.5 VDC (0 - 15 pulse) CNP Drain-up mechanism output (200V AC) CNXA1 Connect to the indoor controller board CNXB1 Connect to the indoor controller board CNXC1 Connect to the indoor controller board CNXA2[...]

31 10-5-2. Indoor controller board PEAD-A24AA PEAD-A30AA PEAD-A36AA PEAD-A42AA SWE Emergency operation SW1 Model selection SW2 Capacity setting CN32 Remote star t/stop adapter CN22 F or MA remote controller cable con- nection (10 - 13 VDC (Between 1 and 3.)) CN51 Centralized control CN41 JAMA standard HA terminal A CN44 Thermistor (liquid/condenser[...]

32 10-6. TROUBLE CRITERION OF MAIN P ARTS PEAD-A24AA PEAD-A30AA PEAD-A36AA PEAD-A42AA Room temperature thermistor (TH1) Condenser/evaporator temperature thermistor (TH5) Measure the resistance with a tester. (Part temperature 10 ° C (50 ° F) ~ 30 ° C (86 ° F)) Pipe temperature thermistor/liquid (TH2) Wiring diagram Check method and criterion Pa[...]

33 10-8. DC F AN MO T OR (F AN MO T OR/INDOOR CONTROLLER BO ARD) Notes · High voltage is applied to the connecter (CNMF) f or the f an motor . Give attention to the service. · Do not pull out the connector (CNMF) for the motor with the po wer supply on. (It causes trouble of the indoor controller circuit board and f an motor .) Self check Symptom[...]

34 SW1 Setting by the dip s witch and jumper wire Functions Jumper wire Model settings Capacity settings P air number setting with wireless remote controller F or ser vice board Remarks SW2 J41 J42 Unit type setting JP1 Indoor controller board type setting JP3 0 1 2 3 ~ 9 Wireless remote controller setting Control PCB setting J41 J42 <Settings a[...]

35 PEAD-A24AA PEAD-A30AA PEAD-A36AA PEAD-A42AA 1. Control bo x 1. Removing the control bo x cov er (1) Remov e the two fixing scre ws on the cov er (A) to remov e it. 2. Thermistor (Intake air) 1. Remov e the control bo x cov er according to the procedure in section [1]. (1) Pull out the thermistor holder (B) and ther mis- tor (C) on the control bo[...]

36 3. Drainpan Exercise caution when remo ving heavy parts. 1. Removing the filter and the bottom plate (1) Push up the tab on the filter , and pull out the filter in the direction of the arrow 1. (2) Remov e the fixing scre ws on the bottom plate (D), (E) to remov e it. 2. Removing the drainpan (1) Pull out the drain pan in the direction of the ar[...]

37 4. Thermistor (Condenser/ev aporator) (Liquid pipe) 1. Remov e the drain pan according to the proce- dure in section [3]. 2. Removing the Heat e xchanger cov er (1) Remov e the f our fixing screws on the heat e xchanger cov er (F) to remov e it. 3. Removing the thermistor (1) Remov e the thermistor (G) from the ther mistor holder (H) on the copp[...]

38 3. Removing the motor cab le (1) Remov e the motor cab le threw the rubber bush. 4. Removing the f an motor and the Sirocco f an (1) Remov e the two motor fixing scre ws to remov e the motor and the Sirocco f an in the direction of arrow 3. Fig. 10 (2) Remov e the f our f an case fixing screws to take the top half of the f an casing off . Fig. 1[...]

39 6. Heat exchanger 1. Remov e the drain pan according to the proce- dure in section [3]. 2. Remov e the heat e xchanger cov er according to the procedure in section [4] 2. 3. Removing the co ver (1) Remov e the fiv e fixing screws on the co ver (K) to remov e it. 4. Removing the Heat e xchanger (1) Remov e the fixing scre ws on the heat e xchange[...]

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New pub lication, effectiv e Jul. 2009. Specifications subject to change without notice. HWE09050 Printed in Japan TM[...]