. MAINTENANCE MAINTENANCE PROCEDURE CHECK AND ADJUST AIR CONDITIONER Check Level of Refrigerant (gas) WARNING Inspection and Maintenance Items Guideline for maintenance interval 4 - 42 If the refrigerant use d in the air conditio ner gets into your eyes o r on y our hands, it may cause loss of sight or frostbite. Do not touch the refrigeran t. Never loosen any part of the r efrigerant ci rcuit. leaking. Do not bring any fla me close to any poin t where the refrigerant gas is If there is a lack of refrigerant (gas), t he cooling p erforman ce will be poor. When oper ating the air cond ottle, use the rec the condition of gerant circuit.
itioner at h igh speed with the engine at full thr window) to check spection (R134a) flowing in the refri No bubbles in r efrigerant flow: Su Some bubbles i (bubbles pass continuously): Lac Colorless, trans parent: No refrige REMARK When there are bu bbles, the refriger ant gas lev el is l ow, so contact your Komatsu dis tributors to have refrigeran t added. I f the air conditioner is run with the refrigera leve damage to the co Inspection During Off Season Even during the of f-season, operate the air conditioner for 3 to 5 minutes once a month to m aintain the oil film at al parts of the compr essor.
Check, mainten items ance Guideli Content of check, maintenance Refrigerant (gas) Charge amount Twice a y Clogged fins Every 500 Compressor Operating condition Every 400 V-belt Damage, tension Every 250 Blower motor, fan Operating condition When req (does it when required make abnormal noise?) Control mechanis m Operating condition (does it function normally?) When req Piping mounts Mounting condition, looseness at tightening or When req connecting portions, leakage of gas, damage