Name: Manual for RAS-07BKV-E / RAS-10BKV-E / RAS-13BKV-E / RAS-07BAV-E / RAS-10BAV-E / RAS-13BAV-E
Brand: TOSHIBA
Availability: InStock

Troubleshooting and error codes

No.	Part name	Procedure	Remarks
①	Microcomputer	1) Turn the power supply off to stop the operation of air-conditioner. 2) Remove the front panel. • Remove the 2 fixing screws. 3) Remove the electrical part base.	Replace terminal block, microcomputer ass'y and the P.C. board ass'y.
①	Common procedure	1) Stop operation of the air conditioner, and turn off the main switch and breaker of the air conditioner. 2) Remove the valve cover. (ST2TØ4 x 10l 1 pc) • After removing screw, remove the valve cover pulling it downward. 3) Remove the wiring cover (ST2TØ4 x 10l 2 pcs.), and then remove the power cord, connecting cable, and cord clamp (ST2TØ4 x 10l 3 pcs.). 4) Remove the upper cabinet. (ST2TØ4 x 10l 5 pcs.) • After removing screws, remove the upper cabinet pulling it upward.
②	Front cabinet	1. Detachment 1) Perform work of item 1 of 1. 2) Remove upper screw (ST2TØ4 x 10ℓ 4 pcs.) of the front cabinet, and lower screws (ST2TØ4 x 10l 8 pcs.) of the front cabinet. • Both side of front cabinet envelop the unit, so remove it by pulling sideward. 3. Attachment 1) Assemble front cabinet to the unit. 2) Attach the removed screws to the original positions.
①	Inverter assembly	1) Perform work of item 1 in. 2) Remove screw (ST2TØ4×10L 2 pcs.) of the upper part of the front cabinet. • Disconnect connectors all connector on P.C. board. • Take off P.C. board out from spacer under P.C. board. • If there is no space above the unit, perform work of 1 in 2. Be careful to check the inverter because high-voltage circuit is incorporated in it. 3) Perform discharging by connecting +, - polarity by discharging resistance (approx. 100Ω~240W) or plug of soldering iron to terminals a of the C07 (printed "CAUTION HIGH VOLTAGE" is attached.) electrolytic capacitor (760µF) on P.C. board. Be careful to discharge the capacitor because the electrolytic capacitor cannot naturally discharge and voltage remains according to trouble type in some cases. NOTE This capacitor is one with mass capacity. Therefore, it is dangerous that a large spark generates if short-circuiting between + and -. 4) Remove screw (ST2TØ4 x 10L 4pcs.) fixing the terminal part of inverter box to the main body. 5) Remove the front cabinet by performing step 1 in , and remove the fixing screws (ST2TØ4 x 10L) for securing the main body and inverter box. 6) Disconnect connectors of various lead wires. Requirement As each connector has a lock mechanism, avoid to remove the connector by holding the lead wire, but by holding the connector.	Inverter module cover P.C. board (Soldered surface) Discharging position (Discharging period 10 seconds or more) Plug of soldering iron Inverter module cover P.C. board (component Side) The connector is one with lock, so remove it while pushing the part indicated by an arrow. Be sure to remove the connector by holding the connector, not by pulling the lead wire.
④	Fan motor	1) Perform work of item 1 of ① and 1 of ②. 2) Remove the flange nut fixing the fan motor and the propeller fan. • Flange nut is loosened by turning clockwise. (To tighten the flange nut, turn counter-clockwise.) 3) Remove the propeller fan. 4) Disconnect the connector for the fan motor from the inverter. 5) Remove the fixing screws (4 pcs.) holding the fan motor by hand so that it does not fall. 6) Cut the motor lead at the point which is 100 mm apart from the connector toward the fan. 7) Use the connector used for the inverter, and pinch the lead wires using the closed end splice.	Fan motor Propeller fan Flange nut Closed end splice
⑤	Compressor	1) Perform work of item 1 of ①, 1 of ② and ③. 2) Extract refrigerant gas. 3) Remove the partition board. (ST2TØ4 x 10l 3 pcs.) 4) Remove the sound-insulation material. 5) Remove the terminal cover of the compressor, and disconnect the lead wire of the compressor thermo and the compressor from the terminal. 6) Remove the pipe connected to the compressor with a burner. • Make sure the flame does not touch the 4 way valve. 7) Remove the fixing screw of the base plate and heat exchanger. (ST2TØ4 x 10ℓ 2 pcs.) 8) Pull upward the refrigeration cycle. 9) Remove the nut fixing the compressor to the base plate.	Compressor
⑥	Fan guard	1. Detachment 1) Perform work of item 1 of ① and 1 of ② Requirement: Perform the work on a corrugated cardboard, cloth, etc. to prevent scratches to the product. 2) Remove the front cabinet, and place it down so that the fan guard side faces downwards. 3) Remove the hooking claws by pushing a minus screwdriver according to the arrow mark in the right figure, and remove the fan guard. 2. Attachment 1) Insert the claws of the fan guard in the hole of the front cabinet. Push the hooking claws (8 positions) by your hand and fix the claws. Requirement: This completes all the attaching work. Check that all the hooking claws are fixed to the specified positions.	Minus screwdriver Hooking claw
⑦	Pulse Modulating Valve coil	1. Detachment 1) Perform work of item 1 of ① and 1 of ② and 3 2) Turn the coil by 180 degrees then remove by pull it upward. 2. Attachment 1) Insert the coil at position which perpendicular with pipe of PMV then turn the coil by 180 degrees. Make sure that lead wire of coil is opposite with pipe of PMV	Rotate 180°C BODY-PMV COIL-PMV
⑧	Control board assembly	1. Disconnect the leads and connectors connected to the other parts from the control board assembly. 1) Leads • 3 leads (black, white, orange) connected to terminal block. • Lead connected to compressor : Disconnect the connector (3P). 2) Connectors CN31: Outdoor fan motor (3P: white)* ( : See Note) CN72: 4-way valve (2P: yellow)* CN61: TE sensor (2P: white)* CN73: PMV (6P: white) CN64: TS sensor (3P: white)* CN62 :TD sensor (3P: white)* CN63: TO sensor (2P: white) NOTE These connectors have a disconnect prevention mechanism: as such, the lock on their housing must be released before they are disconnected. 2. Remove the control board assembly from the spacer. (Remove the heat sink and control board assembly while keeping them screwed together.) 3. Remove the two fixing screws used to secure the heat sink and control board assembly. 4. Mount the new control board assembly. NOTE When mounting the new control board assembly, ensure that the P.C. board is inserted properly into the spacer support.	CN63 CN61 CN62 CN64 CN72 CN73 CN31 CN31,CN72,CN61,CN73,CN64, CN62 and CN63 are connectors with locking mechanisms: as such, to disconnect them, they must be pressed in the direction of the arrow while pulling them out. ↑
⑨	Replacement of temperature sensor for servicing only	1) Cut the sensor 100 mm longer than old one. 2) Cut the protective tube after pulling out it (200 mm). 3) Move the protective tube toward the thermal sensor side and tear the tip of lead wire in two then strip the covering part. 4) Pass the stripped part through the thermal constringent tube. 5) Cut the old sensor 100 mm length on the connector side, and recycle that connector. 6) Tear the lead wire in two on the connector side and strip the covering part. 7) Twist the leads on the connector and sensor sides, and solder them. 8) Move the thermal constringent tubes toward the soldered parts and heat them with the dryer and constring them. 9) Wind the attached color tape round the both terminals of the protective tube when colored protective tube is used. 10) Fix the sensor again. NOTE 1) Store the joint part of the sensor and the connector in the electric parts box. 2) Never joint them near the thermal sensor part. Otherwise it would cause insulation inferiority because of dew drops. 3) When replacing the sensor using the colored protective tube, wind the color tape matching the color of that tube.	Thermal sensor part Cutting here Connector 100 200 Cutting here 70 15 Thermal constringent tube Cutting here 100 Soldered part Dryer Winding the color tape