manualshive.com logo in svg

Mitsubishi Electric MSZ-HC25VA, Service Manual

Share
Download
Mitsubishi Electric MSZ-HC25VA Service Manual Download Page 2

2

Revision A:

 • 10. TROUBLESHOOTING has been corrected.

• Color of lead wire (indoor fan motor : sensor part) of 10-5. ”Trouble criterion of main parts” has been corrected.
• 10-6.” Check of indoor fan motor” has been corrected. [MSZ-HC25]

Revision B:

 • MSZ-HC35VA-

E2

 

and MSZ-HC35VAB-

E2

 

have been added.

Indoor coil thermistor (RT13) has been added.

Summary of Contents for MSZ-HC25VA

Page 1: ...BLESHOOTING 17 11 DISASSEMBLY INSTRUCTIONS 29 MSZ HC25VA E1 MSZ HC35VA E1 MSZ HC35VA E2 MSZ HC35VAB E1 MSZ HC35VAB E2 Outdoor unit service manual MUZ HC VA Series OBH467 SERVICE MANUAL No OBH466 REVISED EDITION B INDOOR UNIT PARTS CATALOG OBB466 NOTE RoHS compliant products have G mark on the spec name plate Revision B MSZ HC35VA E2 and MSZ HC35VAB E2 have been added Please void OBH466 REVISED EDI...

Page 2: ... lead wire indoor fan motor sensor part of 10 5 Trouble criterion of main parts has been corrected 10 6 Check of indoor fan motor has been corrected MSZ HC25 Revision B MSZ HC35VA E2 and MSZ HC35VAB E2 have been added Indoor coil thermistor RT13 has been added ...

Page 3: ...HC35VAB E1 1 Indoor fan motor has been changed DC AC MSZ HC25 2 Indoor heat exchanger has been changed MSZ HC35 3 Indoor electronic control P C board has been changed MSZ HC35VA E1 MSZ HC35VA E2 MSZ HC35VAB E1 MSZ HC35VAB E2 1 Wiring diagram has been changed 1 TECHNICAL CHANGES ...

Page 4: ...ntroller Remote control receiving section Emergency operation switch E O SW ACCESSORIES MSZ HC25VA MSZ HC35VA MSZ HC35VAB Installation plate 1 Installation plate fixing screw 4 25 mm 5 Battery AAA for remote controller 2 Wireless remote controller 1 Felt tape Used for left or left rear piping 1 2 PART NAMES AND FUNCTIONS ...

Page 5: ... A 43 High Med Low 38 32 26 Fan speed Super High rpm 1 110 980 1 140 1 050 1 140 1 050 High Med Low 950 800 650 870 750 630 980 830 680 940 820 660 980 830 680 940 820 660 Fan speed regulator 4 Remote controller model MP06B NOTE Test conditions are based on ISO 5151 Cooling Indoor Dry bulb temperature 27 C Wet bulb temperature 19 C Outdoor Dry bulb temperature 35 C Heating Indoor Dry bulb temperat...

Page 6: ...MSZ HC25VA INDOOR UNIT WALL MICROPHONE 0 8m 1m 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz COOLING FUNCTION SPL dB A LINE Super High FAN SPEED HEATING Test conditions Cooling Dry bulb temperature 27 C Wet bulb temperature 19 C Heating Dry bulb temperature 20 C 43...

Page 7: ...100 57 140 18 Air in Air out Installation plate Piping Drain hose 11 26 Oblong hole Installation plate Indoor unit Wall hole ø65 788 11 20 Oblong hole MSZ HC25VA 5 OUTLINES AND DIMENSIONS 6 WIRING DIAGRAM Piping Insulation ø35 O D Liquid line ø6 35 0 5 m Flared connection ø6 35 Gas line ø9 52 0 43 m Flared connection ø9 52 Drain hose Insulation ø28 O D Connected part ø16 O D ...

Page 8: ...8 MSZ HC35VA E1 MSZ HC35VAB E1 MSZ HC35VA E2 MSZ HC35VAB E2 ...

Page 9: ...tor Refrigerant pipe ø6 35 with heat insulator Indoor coil thermistor RT12 Unit mm MSZ HC35VA E2 MSZ HC35VAB E2 Indoor heat exchanger Flared connection Room temperature thermistor RT11 Flared connection Refrigerant flow in cooling Refrigerant flow in heating Refrigerant pipe ø9 52 with heat insulator Refrigerant pipe ø6 35 with heat insulator Indoor coil thermistor RT12 Indoor coil thermistor RT13...

Page 10: ...e as at left No 4 unit Solder both J1 and J2 How to set the remote controller exclusively for particular indoor unit After you turn the breaker ON the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they...

Page 11: ... the special counter measures are required to prevent the main voltage drop or the rush of the starting current by adding to the system that allows the units to start one by one JR07 Indoor electronic control P C board CN10A CN111 CN151 CN112 8 3 AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode the set temperature and the fan speed are memorize...

Page 12: ...rol button Operation select button Timer mode select button ECONO COOL button INDOOR UNIT DISPLAY SECTION Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state The following indication applies regardless of shape of shape of the indication Indication Operation state Room temperature The unit is operating to reach the set temperature Abo...

Page 13: ...ATE STOP ON OFF button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select HEAT mode with OPERATION SELECT button 3 Press TEMPERATURE buttons TOO WARM or TOO COOL button to select the desired temperature The setting range is 16 31 C 1 Cold air prevention control When the compressor is not operating or is starting and the temperature of indoor heat exchanger and or the ro...

Page 14: ...oprocessor 2 The horizontal vane angle and mode change as follows by pressing VANE CONTROL button 5 STOP operation OFF and ON TIMER standby In the following cases the horizontal vane returns to the closed position a When OPERATE STOP ON OFF button is pressed POWER OFF b When the operation is stopped by the emergency operation c When ON TIMER is ON standby 6 Dew prevention During COOL or DRY operat...

Page 15: ... hori zontal position Sometimes the area around your feet may not warm To warm the area around the feet set the hori zontal vane to AUTO or the downward blowing position When VANE CONTROL button is pressed again the vane returns to the previously set position and the air conditioner starts the heat operation in approx 3 minutes NOTE If you make the airflow not to blow directly onto your body by pr...

Page 16: ...n case of latter normal operation will start NOTE Do not press EMERGENCY OPERATION switch during normal operation Operation mode COOL HEAT Set temperature 24 C 24 C Fan speed Med Med Horizontal vane Auto Auto The operation mode is indicated by the Operation Indicator lamp as following Operation Indicator lamp EMERGENCY COOL EMERGENCY HEAT STOP Lighted Not lighted 1 How to set the timer 1 Press OPE...

Page 17: ...omputer when batteries are replaced This function is equipped to prevent the microcomputer from malfunctioning due to the voltage drop caused by the battery replacement Press RESET button with a thin instrument and then use the remote controller Remove the back lid and insert batteries Then reattach the back lid 10 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the following 1 Check ...

Page 18: ...k the blinking pattern and confirm the abnormal point with the indoor unit failure mode table Refer to 10 2 2 Make sure to check at least two consecutive blinking cycles 2 Releasing the failure mode recall function Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller The outdoor unit is abnor...

Page 19: ...cteristics of the main indoor coil ther mistor the sub indoor coil thermistor 10 7 3 time flash 2 5 second OFF Serial signal The serial signal from outdoor unit is not re ceived for a maximum of 6 minutes Refer to 10 6 How to check miswiring and serial signal error 11 time flash 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emit during the 12 seconds the indoor fa...

Page 20: ...t Run operation means the operation within 30 minutes after EMERGENCY OPERA TION switch is pressed Refer to outdoor unit service manual Upper lamp Flash on and off at 0 5 sec ond intervals Cause Indoor Outdoor unit Miswiring or trouble of serial signal Upper lamp 2 time flash Cause Indoor unit Trouble of room temperature indoor coil thermistor Upper lamp 3 time flash Cause Indoor unit Trouble of i...

Page 21: ... Replace the indoor electronic control P C board 5 Outdoor power sys tem Upper lamp flashes 5 time flash 2 5 second OFF It consecutively occurs 3 times that the com pressor stops for overcurrent protection or start up failure protection within 1 minute after start up Refer to How to check of in verter compressor Refer to outdoor unit service manual Check the stop valve 6 Outdoor thermistors Upper ...

Page 22: ...or fan motor MF MSZ HC35 Check 10 6 Vane motor MV Measure the resistance between the terminals with a tester Part temperature 10 30 C Color of the lead wire Normal RED BLK 235 255 Ω BLK RED WHT GRY YLW BRN MAIN AUX FUSE BLK BLK RED BLK BLK ROTOR A Check of indoor fan motor Yes 0 or No Yes No Turn ON the power supply Rotate indoor fan slowly for 1 revolution or over with a screwdriver etc from air ...

Page 23: ...tage between CN211 and on the power P C board rise to the range of 2 to 6 VDC within 12 seconds after EMERGENCY OPERATION switch is pressed Replace the indoor fan motor Yes No The indoor fan motor error has occurred and the indoor fan repeats 12 second ON and 30 second OFF 3 times and then stops Measure the voltage between CN211 and while the fan is rotating Replace the indoor power P C board and ...

Page 24: ...troller visible Remove the batteries then set them back and press RESET button Refer to 10 1 4 Check if the unit operates with the remote controller Yes No Turn ON a radio to AM and press OP ERATE STOP ON OFF button on the remote controller Is noise heard from radio Yes No Replace the remote controller Are there any fluorescent lights of inverter or rapid start type within the range of 1 m Yes No ...

Page 25: ...the indoor power P C board terminal P C board and the indoor fan motor Replace the indoor power P C board and the indoor terminal P C board Measure the resistance of the vane motor coil Refer to 10 5 Short circuit Replace the vane motor and the indoor electronic control P C board 1 The fan motor connector s lead wire is red whereas is black 2 Connect of the tester to fan motor connector s lead wir...

Page 26: ...emove the short circuit between out door terminal block S2 and S3 Turn ON the power supply Is there amplitude of 10 to 20 VDC between indoor terminal block S2 and S3 Confirmation of serial signal Is there rated voltage between indoor terminal block S1 and S2 Confirmation of power voltage Yes No Is there any error of the in door outdoor connecting wire such as the damage of the wire intermediate co...

Page 27: ...or the installation condition combination of specific conditions such as antennas or wiring Check the following before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor ...

Page 28: ...P C board Resistor R111 Please replace the fuse after removing the indoor terminal P C board from the electrical box Fuse F11 Varistor NR11 Terminal block Connector to indoor electronic control P C board CN20A 5 VDC 12 VDC GND Indoor fan motor CN211 325 VDC GND high voltage DC 15 VDC 3 6 VDC 0 6 V Indoor terminal P C board Indoor power P C board Please replace the fuse after removing the indoor te...

Page 29: ...elease of Auto restart function Solder the Jumper wire to JR07 Refer to 8 3 Emergency operation switch E O SW SW1 2 Indoor electronic control P C board GND 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the sleeve Pull the terminal while pushing the locking lever Hold the sleeve and pull out the terminal slowly Con...

Page 30: ...oving the indoor power P C board the indoor terminal P C board and the electrical box 1 Turn the breaker OFF 2 Remove the panel refer to 1 and the corner box 3 Remove the screw of V A clamp and then the indoor outdoor connecting wire 4 Remove the earth wire connected to the indoor heat exchanger from the electrical box 5 Unhook first the lower then the upper catches of the electrical box and pull ...

Page 31: ...in hose from the nozzle assembly and remove the nozzle assembly 4 Loosen the screw fixing the line flow fan 5 Remove the screws fixing the motor bed Lift the right side of motor bed a little and pull right to remove the fan motor together with motor band bed 6 Remove the indoor coil thermistor from the heat exchanger MSZ HC35VA B E2 Install the indoor coil thermistor in its former position when as...

Page 32: ...2007 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Aug 2008 No OBH466 REVISED EDITION B 6 Distributed in Feb 2007 No OBH466 REVISED EDITION A 6 Distributed in Jan 2007 No OBH466 6 Made in Japan New publication effective Aug 2008 Specifications subject to change without notice ...

Reviews:

No comments

Brands by name

Popular brands

Load more brands