Hikvision DS-K4DC104 Door Closer

• Lubricate the joints in the arm assembly with good quality machine oil
• Check all fixing are secure
• Check closing speed are acceptable and Adjust necessary
• Ensure the door Closes from any opening angle to which it may be opened and adjust if necessary.
• These Checks should be carried out at least every 6 Months, and at the shorter intervals for heavily used doors