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.MAINTENANCE PROCEDURE
CHECK AND ADJUST AIR CONDITIONER
Check level of refrigerant (gas)
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 there is a lack of refrigerant (gas), the cooling performance
will be poor. When operating the cooler at high speed with the
engine at full throttle, use the receiver sight glass (inspection
window) to check the condition of the refrigerant gas (Freon
R134a) flowing in the refrigerant circuit.
No bubbles in refrigerant flow: Suitable (A)
Some bubbles in flow (bubbles pass continuously): Lack of
refrigerant (B)
Colorless, transparent: No refrigerant (C)
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 - 5 minutes once a month to maintain the oil film at all
parts of the compressor.
Inspection and Maintenance Items
Check, maintenance
items
Refrigerant (gas)
Condenser
Compressor
V-belt
Blower motor, fan
Control mechanism
Piping mounts
4-32
Content of check, maintenance
Charge amount
Clogged fins
Operating condition
Damage, tension
Operating condition (does it When required make abnor-
mal noise?)
Operating condition (does it function normally?)
Mounting condition, looseness at tightening or connecting
portions, leakage of gas, damage
WARNING
Sight glass
MAINTENANCE
A
B
C
Receiver
Guideline for maintenance interval
Twice a year (spring, autumn)
Every 500 hours
Every 4000 hours
Every 250 hours
When required
When required
When required
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