Instruction/ maintenance manual of the product RADS-51B Heat Controller
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5RRP$LU&RQGLWLRQHU +($ 7&2175 2//(5,1& 02'(/6 RADS-51B 6HUYLFH$QG3DUWV0DQXDO CAUTION PRECAUTIONS IN THIS MANUAL.
—2— CONTENTS 1. PREF A CE ...................................................................................................................................................3 1.1 FEA TURES...........................................................
—3— 1-1. PREF A CE This ser vice man ual provides v ar ious service information, including the mechanical and electr ical parts, etc. This room air conditioner was manuf actured and assembled under a strict quality control system. The refrigerant is charged at the factory .
—4— 1.3 LOCA TIONS OF CONTROLS 1.4 SAFETY PRECA UTIONS 1. When ser vicing, set the R OT AR Y SWITCH to Off and unplug the power cord. 2. Obser v e the or iginal lead dress . If a shor t circuit is f ound, replace all par ts which hav e been ov erheated or damaged by the short cir- cuit.
—5— 2. DISASSEMBL Y INSTR UCTIONS 2.1 MECHANICAL P AR TS 2.1.1 FRONT GRILLE 1. Pull the inlet grille forw ard. 2. Remov e the screw securing the F ront Gr ille . (Fig. 3) 3. Push the grille up from the bottom and pull the top of the grille aw a y from the case to lift the top tabs out of their slots.
— 6 — 2.2 AIR HANDLING P AR TS 2.2.1 AIR GUIDE UPPER 1. Disconnect the unit from the power source . 2. Remov e the front grille. (Refer to Section 2.1.1) 3. Remov e the cabinet. (Refer to Section 2.1.2) 4. Remov e the control board. (Ref er to Section 2.
— 7 — 2.2.3 MO T OR 1. Disconnect the unit from the power source . 2. Remov e the front grille. (Refer to Section 2.1.1) 3. Remov e the cabinet. (Refer to Section 2.1.2) 4. Remov e the control board. (Ref er to Section 2.1.3) 5. Remov e the air guide upper .
— 8 — 2.3.2 COMPRESSOR 1. Remov e the front grille and cabinet. (Ref er to Section 2.1) 2. Discharge the refrigerant by using a refrigerant recov er y system. 3. Remov e the overload protector . (Ref er to Section 2.3.1) 4. After discharging the unit completely , unbrace the suction and discharge pipes at the compressor connections.
— 9 — 2.3.6 PO WER CORD 1. Disconnect the unit from source of power . 2. Remov e the front grille. (Refer to Section 2.1.1) 3. Remov e the cabinet. (Refer to Section 2.1.2) 4. Remov e a screw that secures control board to base pan. (Ref er to Section 2.
2.4.2 EV APORA T OR 1. Remov e the cabinet. 2. Discharge the refrigerant by using a refrigerant recov er y system. 3. Remov e the air guide upper . (Refer to Section 2.2.1) 4. After discharging the refrigerant completely , unbraze the interconnecting tube at the condenser connections.
— 11 — Equipment needed: V acuum pump, charging cylinder , manifold gauge , brazing equipment, pinch-off tool capab le of making a vapor proof seal, leak detector , tubing cutter , hand tools to remov e components and ser vice v alve .
— 12 — 3. INST ALLA TION This air conditioner is designed with a button-down chassis so it can be easily installed in a window . 3.1 SELECT THE BEST LOCA TION 1. T o prev ent vibration and noise, mak e sure the unit is installed securely and firmly .
— 13 — Installation 3.2.2 BEFORE INST ALLA TION 1. Inser t the guide panels into the guides of the air condi- tioner . F asten the cur tains to the unit with scre ws (TYPE A) as shown Figure . 25. 2. Cut the adhesive-bac ked seal strip (TYPE D) to the window width.
3 . INST ALL THE AIR CONDITIONER IN THE WINDO W a. Carefully lift the air conditioner and slide it into the open window . Make sure the bottom guide of the air conditioner drops into the notches of the L brac ket.
— 15 — REMO V AL FROM WINDO W T ur n the air conditioner off, disconnect the po wer cord, remov e the L brac ket and the scre ws installed through the top and bot- tom of the guide panels, and sa ve f or reinstallation later . Close the guide panels.
— 16 — 4.2 PIPING SYSTEM Figure 32 is a b r ief desc r iption of the impo r tant components and their function in what is called the ref r ige r ation system. This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle.
— 17 — 4.3 TR OUBLESHOO TING GUIDE In general, possib le trouble is classified in tw o kinds. The one is called Starting Failure which is caused b y an electr ical def ect. The other is Ineffective Air Con- ditioning caused by a def ect in the refrigeration circuit and improper application.
— 18 — Fails to Start Improper ther mostat setting Loose ter minal connection Improper wiring Check of po wer source. Drop of power v oltage. Capacitor check. Replacement. Check of control s witch setting. Compressor f ails only to star t. Def ect of compressor capacitor .
— 19 — ROOM AIR CONDITIONER V OL T A GE LIMITS NAME PLA TE RA TING MINIMUM MAXIMUM 115V ± 10% 103.5V 126.5V COMPLAINT CA USE REMED Y F an motor will not run. No power Check v oltage at outlet. Correct if none. P ower supply cord Check v oltage to rotar y s witch.
— 20 — COMPLAINT CA USE REMED Y F an motor noise. F an If crac ked, out of balance , or par tially missing, replace it. Blower If crac ked, out of balance , or par tially missing, replace it. Loose set screw Tighten it. W orn bear ings If knocking sounds contin ue when running or loose, replace the motor .
— 21 — COMPLAINT CA USE REMED Y Compressor cycles on F an motor If not running, deter mine the cause. Replace if ov er load. required. Condenser air flow Remo ve the cabinet, inspect the interior surf ace restriction of the condenser . If restricted, clean carefully with a vacuum cleaner (do not damage fins) or brush.
— 22 — 5. CIRCUIT DIA GRAM 1 2 6 7 5 3854AR2330A COMP. MOTOR ROCKER SWITCH YL BR THERMOSTAT OLP BR R BL RD BK OR(BR) CAPACITOR F H C YL ROTARY SWITCH 2H L M BK BR RD BL BK POWER INPUT BK(BR) (Plain) WH(BL) (Ribbed) GN(GN/YL) RD BL YL OR(BR) 4 6 8 1 3 5 7 BL RD BK BR WIRING DIAGRAM SYNC.
—23— 6. EXPLODED VIEW 352390 130410 359012 W48602 354210 349480 352380 149980 559011 346811 554030 W48602 130910 550140 554160 567502 352115 352111 352113 35211A 135313 152302 135312 731273 264110.
RA DS - 51B Description 130410 3041A 20036G BA SE AS SEMBLY,W ELD R 130910 3091A R6055M CA BINET A SSEMBLY,SINGL E R 135312 3531A20087D GRILLE A SSEM BLY,FRONT R 135313 3530A 10039H GRILLE,INLET R 147.
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