Instruction/ maintenance manual of the product MSY-D30NA Vermont Casting
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SER VICE MANUAL CONTENTS 1. TECHNICAL CHANGES ······································· 3 2. P ART NAMES AND FUNCTIONS ····················· 4 3. SPECIFICA TION ················································ 5 4.
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3 1 TECHNICAL CHANGES MSZ-D30NA MSZ-D36NA MSY -D30NA MSY -D36NA 1. New model.
4 Remote controller Operation indicator lamp Remote control receiving section Emergency operation switch Horizontal vane Air outlet Air fi lter (Catechin air fi lter) Air inlet Front panel Air clean.
5 5 3 SPECIFICA TION Model MSZ-D30NA MSY -D30NA MSZ-D36NA MSY -D36NA External fi nish White Power supply V , phase, Hz 208 / 230 , 1 , 60 Max. fuse size (time delay)/ Disconnect switch A1 5 Min. circuit ampacity A 1.0 Fan motor F .L.A 0.76 Air fl ow Low-Med.
6 6 3-1. OPERA TING RANGE (1) POWER SUPPL Y 3-2. OUTLET AIR SPEED AND COVERAGE RANGE (2) OPERA TION The air coverage range is the figure up to the position where the air speed is 1 ft./sec., when air is blown out horizon- tally from the unit properly at the High speed position.
7 7 4 OUTLINES AND DIMENSIONS Unit : inch MSZ-D30NA MSZ-D36NA MSY -D30NA MSY -D36NA Wireless remote controller Piping Insulation Liquid line Drain hose Gas line Indoor unit Air out Air in 45-1/2 46-1/.
8 5 WIRING DIAGRAM MSZ-D30NA MSZ-D36NA MSY -D30NA MSY -D36NA.
9 REFRIGERANT SYSTEM DIAGRAM 6 MSZ-D30NA MSZ-D36NA MSY -D30NA MSY -D36NA Refrigerant flow in cooling Refrigerant flow in heating Unit:inch Indoor heat exchanger Room temperature thermistor RT1 1 Refri.
10 7 SER VICE FUNCTIONS 7-2. P .C. BOARD MODIFICA TION FOR INDIVIDUAL OPERA TION A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller , P .
7-3. AUTO REST ART FUNCTION When the indoor unit is controlled with the remote controller , the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P .C. board. The “AUT O REST ART FUNCTION” sets to work the moment power has restored after power failure.
12 8 MICROPROCESSOR CONTROL NOTE: Last setting will be stored after the unit is turned OFF with the remote controller . Indoor unit receives the signal of the remote controller with beeps.
13 8-3. HEA T ( ) OPERA TION (MSZ) (1) Press OPERA TE/STOP (ON/OFF) button. OPERA TION INDICA TOR lamp of the indoor unit turns on with a beep tone. (2) Select HEA T mode with OPERA TION SELECT button. (3) Press TEMPERA TURE buttons (TOO W ARM or TOO COOL button) to select the desired temperature.
14 (4) The initial set temperature is decided by the initial room temperature. 1 When the system is restarted with the remote controller , the system operates with the previous set temperature regardless of room temperature at restart. The set temperature is calculated by the previous set temperature.
15 (3) Positioning T o confirm the standard position, the vane moves until it touches the vane stopper . Then the vane is set to the selected angle. (a) The operation starts or finishes (including timer operation). (b) The test run starts. 8-7. AUTO V ANE OPERA TION 1.
16 6 1 23 45 SWING 2. V ertical vane (1) V ane motor drive These models are equipped with a stepping motor for the vertical vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx. 12 V) transmitted from microprocessor .
17 8-8. TIMER OPERA TION 1. How to set the time (1) Check that the current time is set correctly . NOTE : T imer operation will not work without setting the current time. Initially “0:00” blinks at the current time display of TIME MONIT OR, so set the current time correctly with CLOCK SET button.
18 EMERGENCY OPERA TION switch E.O. SW E.O. SW 8-9. EMERGENCY/TEST OPERA TION In case of test run operation or emergency operation, use EMERGENCY OPERA TION switch on the front of the indoor unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of the remote controller run down.
19 9-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring.
20 20 Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (9-4.
21 21 2. Indoor unit failure mode table NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (9-4.). Left lamp of OP- ERA TION INDICA- TOR lamp Abnormal point (Failure mode) Condition Correspondence Not lighted Normal — — 1-time fl ash every 0.
22 22 9-3. INSTRUCTION OF TROUBLESHOOTING Indoor unit oper- ates. Outdoor unit doesn't operate. If blinking of OPERA TION INDI- CA T OR lamp cannot be checked, it can be checked with failure mode recall function. Indoor unit operates. Outdoor unit doesn't operate normally .
23 23 9-4. TROUBLESHOOTING CHECK T ABLE Not lighted Blinking OPERA TION INDICA TOR Lighted Before taking measures, make sure that the symptom reappears for accurate troubleshooting.
24 Part name Check method and criterion Figure Room temperature thermistor(RT1 1) Indoor coil thermistor (RT12(MAIN), R T13(SUB)) Measure the resistance with a tester . Refer to 9-7. "T est point diagram and voltage", "Indoor electronic control P .
25 25 A Check of indoor fan motor OPERA TION INDICA TOR lamp flashes 3-time. Indoor fan does not operate. 9-6. TROUBLESHOOTING FLOW The indoor fan motor error has occurred, and the indoor fan doesn't operate.
26 26 B Check of remote controller and receiver P .C. board Indoor unit operates by pressing EMERGENCY OPERA TION switch, but does not operate with the remote controller . Check if the remote controller is exclusive for this air conditioner . Does the unit operate with the remote controller? OK Ye s No (not clear) Replace the batteries.
27 27 The unit does not operate with the remote controller . Also, OPERA TION INDICA TOR lamp does not light up by pressing EMERGENCY OPERA TION switch. C Check of indoor electronic control P .C. board and indoor fan motor T urn OFF the power supply .
28 28 D How to check miswiring and serial signal error • Unit cannot operate neither by the remote controller nor by EMERGENCY OPERA TION switch. Indoor unit does not operate. • OPERA TION INDICA TOR lamp flashes ON and OFF every 0.5-second. Outdoor unit does not operate.
29 29 E Electromagnetic noise enters into TV sets or radios Ye s Is the unit grounded? No Ground the unit. Ye s Is the distance between the antennas and the indoor unit within 9.91 ft., or is the distance between the antennas and the outdoor unit within 9.
30 (+)0 VDC or 15 VDC MSZ-D30NA MSZ-D36NA MSY -D30NA MSY -D36NA Indoor electronic control P .C. board 208 / 230 V AC Fuse (F1 1) 250 V 3.15 A Indoor coil thermis- tor RT12(MAIN) RT13(SUB) (CN1 12) Horizontal vane motor(CN151) SW P .
31 OPERA TING PROCEDURE PHOTOS 1. Removing the panel (1) Press and unlock the knobs on both sides of the front panel and lift the front panel until it is level, and then pull the hinges forward to remove the front panel. (2) Remove the screw caps of the panel.
32 OPERA TING PROCEDURE PHOTOS 3. Removing the nozzle assembly (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the electrical cover . (Refer to 2.) (3) Remove the electrical side cover , disconnect the vane motor connector . (4) Pull out the drain hose from the nozzle assembly , and remove the nozzle assembly .
OPERA TING PROCEDURE PHOTOS 6. Removing the line flow fan and the indoor fan motor (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the electrical box. (Refer to 2.) (3) Remove the nozzle assembly . (Refer to 3.) (4) Remove the water cover .
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HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAP AN Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO.,L TD Distributed in Feb. 2008. No. OBH501 7 Made in Japan New publication, effective Feb. 2008 Specifications subject to change without notice.
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