. OPERATION TROUBLES AND ACTIONS REMARK 3 - 144 Point of Contact to Telephone when Error Occurs If a as f n error ollows screen each ti is displayed on the m me input confirmatio onitor, th n switch ( Error scree Check the n -> sc point o reen A - f contact > screen B telephone -> screen number o C -> erro n screen If th e point of cont act telephon e numb er has no t been registered, screen B is not di splayed. If it is necessary to register the point of contact t elephone number, ask your K omatsu distributor to regist er it.