Toshiba RAV-SM800XT-E Freeze preventive control Low temperature release, Louver control, Remarks

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8-5. Freeze preventive control (Low temperature release)

The cooling operation (including Dry operation) is performed as follows based on the detected temperature of Tc sensor or Tcj sensor.

When [J] zone is detected for T1 minutes (Following figure), the commanded frequency is decreased from the real operation frequency. After then the commanded frequency changes every 2 minutes while operation is performed in [J] zone.

T1

Normal

1 minute

In [K] zone, time counting is interrupted and the operation is held.

When [I] zone is detected, the timer is cleared and the operation returns to the normal operation.

(°C)

 

 

 

7

 

I

A

 

6

 

 

K

 

 

 

5

 

 

J

 

 

 

 

 

Fig. 8-5-1

In heating operation, the freeze-preventive control works if 4-way valve is not exchanged and the condition is satisfied.

Remarks:

Tcj : Indoor heat exchanger sensor temperature

8-6. High-temp release control

The heating operation is performed as follows based on the detected temperature of Tc sensor.

When [M] zone is detected, the commanded frequency is decreased from the real operation frequency. After then the commanded frequency changes every 30 seconds while operation is performed in [M] zone.

In [N] zone, the commanded frequency is held.

When [L] zone is detected, the commanded frequency is returned to the original value by approx. 6Hz every 60 seconds.

8-7. Louver control

(1)Vertical air flow louver

Position of veritcal air flow louver is automatically controlled according to the operation mode. Besides, position of vertical air flow louver can be arbitrarily set by pressing [FIX] button.

The louver position which is set by [FIX] button is stored in the microcomputer, and the louver is automatically set at the stored position for the next operation.

(2)Swing

If [SWING] button is pressed when the indoor unit is in operation, the vertical air flow louver starts swinging. When [SWING] button is pressed, it stops swinging.

8-8. Filter sign display

(1)The operation time of the indoor fan is calculated, the filter lamp (Orange) on the display part of the main unit goes on when the specified time (240H) has passed. When a wired remote controller is connected, the filter reset signal is sent to the remote controller, and also it is displayed on LCD of the wired remote control.

(2)When the filter reset signal has been received from the wired remote control after [FILTER] lamp has gone on or when the filter check button (Temporary button) is pushed, time of the calculation timer is cleared. In this case, the measurement time is reset if the specified time has passed, and display on LCD and the display on the main unit disappear.

Remarks:

[FILTER] goes on

Tc (°C)

55 A

M

52N

48 B

L

Fig. 8-6-1

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Contents AIR-CONDITIONER Contents Specifications Indoor UnitOperation characteristic curve Cooling Heating CurrentOutdoor Unit RAV-SM560AT-E RAV-SM800AT-EConstruction Views Outdoor Unit RAV-SM560AT-E Outdoor Unit RAV-SM800AT-E Systematic Refrigerating Cycle Diagram RAV-SM560XT-E / RAV-SM560AT-ERAV-SM800XT-E / RAV-SM800AT-E Indoor unitWiring Diagram Color IdentificationL N Board Specification of Electrical Parts Parts name Type SpecificationsRefrigerant R410A Safety During Installation/ServicingRefrigerant Piping Installation Piping materials and joints usedProcessing of piping materials 1 Thicknesses of annealed copper pipes Thickness mmOuter diameter mm R410A R22 Clutch type Wing nut type Width·m kgf·cm ·m kgf·mGeneral tools Conventional tools can be used ToolsRequired tools 1 Configuration of refrigerant charging Recharging of RefrigerantBrazing of Pipes Activated flux Characteristics required for fluxTypes of flux Noncorrosive flux Filler FluxControl Block Diagram OperationAir volume control When power supply is resetOperation mode selection Operation DescriptionCool air discharge preventive control 1 Cold draft preventing controlLouver control Freeze preventive control Low temperature releaseHigh-temp release control Filter sign displayOperation How to set auto restart functionAuto Restart Function MotionsHow to turn off filter check lamp How to cancel auto restart functionPower failure during timer operation Filter Check LampUnder Ceiling Installation Installation ProcedureInstallation Diagram of Indoor and Outdoor Units Console InstallationPrecautions for Safety To Disconnect the Appliance from Main Power SupplyPage Parts to be procured locally Accessory parts and Parts to be procured locallyAccessory parts Selection of Installation Place Avoid installing in the following placesRemote controller usage Installation PlaceRemote controller Before Installation Remove the Air inlet grilleCondition for Installation Install the indoor unitInstall the Suspension bolts Piping and Drain Hose InstallationConnect the Flexible pipe 5 to the large pipe Gas side Axis Cutting a hole and mounting the Installation plateUnit must not decline more than 15 mm in either Drain Piping Work DrainageRefrigerant Piping Tightening connection Evacuating Heat insulation For RAV-SM560AT-E model Electrical Work Final Installation Checks LED indication and code checking Environment Before troubleshooting TroubleshootingSummary of Troubleshooting Troubleshooting procedureSelf-Diagnosis by Remote Control Check Code How to use remote control in service modeJudgement and action No display in the setting at shipment Operation Troubleshooting for Each Check Code 1A error YESError 1C error* Except RAV-SM560AT-E 1F error 1D error1E error Connector normal? 20 TE, TO, TS sensor TA sensor TC, TCJ sensor Caracteristics-1 Caracteristics-2Caracteristics-3 TD sensor Caracteristics-4Primary check Inspection procedureCompressor does not operate Cooling and heating model Are all of compressor cords normal? Remove the Panel arms from the Front panel How to install the Air inlet grilleDetachments Open 3 Cap screws and remove the screws How to remove the Drain pan Assembly Pan assembly Refrigeration How to remove the Refrigeration assemblyFan motor Part name Procedures RemarksHow to remove the Multiblade fan No. Part name Procedure Remarks DetachmentProcedure Remarks Requirement Connection with the power terminal Part name Procedure Remarks ‡ Compressor Perform works of items 1 ‚, ƒ, „, … Fan guard Remove the upper cabinet Discharge port cabinet for the heat ex Requirement Part name… Control P.C Remove the inverter box from P.C. board base Loosen the flange nut by turning clock † Compressor Perform works of items , ‚, ƒ, „, Ø4 x 10L , 2 pcs. per one reactor Product Exploded Views and Parts List Indoor Unit E-Parts AssyAir Inlet Grille Inverter 21,22 16,17 Outdoor Unit Inverter Assy, RAV-SM560AT-E 702 TE Sensor TS Sensor To Sensor TD Sensor 701 705 703 704Inverter BOX Outdoor Unit Inverter Assy, RAV-SM800AT-E