From inside (document excerpt):
Cleaning Wiring The Air Curtain should be cleaned when it gets dirty — roughly once every three months as a general rule. Also, be sure to clean and test run the Air Curtain Make wiring connections for the parts indicated by black lines in the connection before starting operation for the summer and winter seasons. diagram. · Always switch power off before cleaning the unit. I Operation with switching between high and low settings · Never hang from the unit or push downward on it forcefully.
A serious accident could result. Using a commercially available switch Using the FS-04SW-E · Wear rubber gloves to avoid injuring your fingers. Control Switch Power Source ON/OFF HIGH/LOW GREEN COMMON RED LOW BLUE HIGH WHITE Terminal Block Operation lamp FS-04SW-E Unit Terminal Block Power Source COMMON LOW 0012872HC9201 Disassembling the Unit Guard stopper screw Washer Hook GREEN RED BLUE WHITE ON / OFF Switch HIGH / LOW Switch HIGH If the power is located near the unit body, it is convenient to remove the unit body from the wall mounting plate for cleaning. AIR CURTAIN GK-25 series GK-30 series OPERATING AND INSTALLATION INSTRUCTIONS Be sure to read this instruction manual before starting installation work. Installation work must be carried out by a dealer or a specialist installation contractor. I Control switches are required to operate this unit. I This is a single-phase product. Check the power supply before proceeding with the installation work. Be sure to hand over these Operating and Installation Instructions to the user when the installation work has been completed. I After reading this information, keep it in a place where any person using the product can refer to it at any time. Second Unit Second unit · The operation for the FS-04SW-E control switch is designed to accommodate a cable with a diameter of 1.6mm or 2.0mm only. I Operation in the high or low setting only High speed operation Unit Terminal Block GREEN COMMON LOW HIGH Low speed operation Unit Terminal Block 1. Remove the guard stopper screw and the washer. Then slide the guard Guard toward the wall mouting plate as shown in the diagram and remove it Unit body from the hook.(The number of guards differs depending on the Nut (M5 counterclockwise model.) threading) 2. Remove the fan nut (M5 Fan counterclockwise threading) and pull Washer off the fan. Note · Note that the fan fits onto the shaft in a specific orientation. Essential Safety Precautions Please be absolutely sure to read through the following information: it will help you to install the Air Curtain correctly and safely and to operate it properly. The precautions presented here contain important safety information: be sure to follow the applicable instructions given. · Before proceeding with installation and operation, please be sure to read “Essential Safety Precautions” as it will tell you how to install and operate the product properly and safely. · The displays have the following significance. WARNING CAUTION This applies to mishandling or misoperation of the product which may lead to a fatal or serious injury. This applies to mishandling or misoperation of the product which will lead to injury or damage to your home, household effects, etc.