Check And Maintenance Air Conditioner - Komatsu ecot3 Operation And Maintenance Manual

MAINTENANCE

CHECK AND MAINTENANCE AIR CONDITIONER

Check Level of Refrigerant (gas)
If the refrigerant used in the air conditioner gets into your eyes or on your hands, it may cause loss of sight or frostbite. Do not
touch the refrigerant. Never loosen any part of the refrigerant circuit.
Do not bring any flame close to any point where the refrigerant gas is leaking.
If the refrigerant (gas) level is low, the cooling effect will become
poor. When the engine is running at full throttle and the cooler is
running at high speed, look at the sight glass (1) (inspection
window) in the refrigerant hose mouthpiece to check the condition
of the refrigerant gas (Freon R134a) flowing in the refrigerant
circuit.
(A) No bubbles in refrigerant flow: Suitable
(B) Some bubbles in flow (bubbles pass continuously):
Lack of refrigerant
(C) Colorless, transparent: No refrigerant
REMARK
When there are bubbles, the refrigerant gas level is low, so contact
your Komatsu distributors to have refrigerant added. If the air
conditioner is run with the refrigerant gas level low, it will cause
damage to the compressor.
Inspection During Off Season
Even during the off-season, operate the air conditioner for 3 to 5 minutes once 1 month to maintain the oil film at all
parts of the compressor.
Inspection and Maintenance Items
Check, maintenance items
Refrigerant (gas)
Air conditioner condenser
Compressor
V-belt
Blower motor, fan
Control mechanism
Piping mounts
WARNING
Content of check, maintenance
Charge amount
Clogged fins
Operating condition
Damage, tension
Operating condition
(does it make abnormal noise?)
Operating condition (does it function normally?)
Mounting condition, looseness at tightening or
connecting portions, leakage of gas, damage
MAINTENANCE PROCEDURE
Guideline for maintenance
interval
Twice 1 year (spring, autumn)
Every 500 hours
Every 4000 hours
Every 250 hours
When required
When required
When required
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