MAINTENANCE PROCEDURE MAINTENANCE
4-38
CHECK AND ADJUST AIR CONDITIONER 4
Check Level of Refrigerant (gas)
WARNING
If the refrigerant used in the cooler 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 level of the refrigerant (gas) is low, the cooling effect will
be reduced. Run the engine at high idling, and check the flow
of the refrigerant gas (freon 134a) in the refrigerant circuit
through the sight glass (2) (inspection window) of the receiver
(1) when the cooler is running at high speed.
(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 refrigerant dealer 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 a month to maintain the oil film at all
parts of the compressor.
Inspection and Maintenance Items
Check, maintenance items Content of check, maintenance Guideline for maintenance interval
Refrigerant (gas) Charge amount Twice a year (spring, autumn)
Condenser Clogged fins Every 500 hours
Compressor Operating condition Every 4000 hours
V-belt Damage, tension Every 250 hours
Blower motor, fan
Operating condition
(does it when required make abnormal noise?)
When required
Control mechanism Operating condition (does it function normally?) When required
Piping mounts
Mounting condition, looseness at tightening or connecting
portions, leakage of gas, damage
When required
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