4-- 1© 2012 Mobile Climate Control T-299 Rev. 08/2012
SECTION 4
SERVICE
WARNING
Be sure to observe warnings listed in the safety summary in the front of this manual before
performing maintenance on the air conditioning system
4.1 PREVENTATIVE MAINTENANCE SCHEDULE
SYSTEM
OPERATION
ON OFF
a. Daily Maintenance
X X
X
Pre-trip inspection - after starting. (Refer to paragraph 2.7)
Check tension and condition of drive belts. (Refer to paragraph 4.12)
b.Weekly Maintenance
X
X
Perform daily inspection
Check condenser, evaporator coils and return air filters for cleanliness
c. Monthly Maintenance
X
X
X
X
X
X
Perform weekly inspection
Clean or replace Evaporator return air filters
Inspect Condenser coil fins - Clean when necessary
Inspect refrigerant hoses and fitting connections. (Refer to paragraph 4.10)
Inspect electrical harness and connections
Check battery voltage - System operates efficiently at 13.5 volts
d.Quarterly Inspection
X
X
X
X
X
X
X
Inspect Evaporator(s) coil fins (heater coil if installed) Clean if needed.
Check blower operation.
Check current draw and voltage of system components including fan motors. (Repair or replace any compo
nent showing more than 0.2 volt drop). (Refer to Table 3-1, Table 3-2, or Table 3-3)
Check that all compressor mounting brackets and hardware are tight. Tighten and torque to proper specifi
cations. (Refer to paragraph 4.11)
Check hose and harness under vehicle for proper support and protection
Check Evaporator drain lines.
e. Semi-Annual Inspection and Maintenance
X
X
X
X
X
X
Check system pressures. (Refer to Table 4-5)
Check refrigerant in sight glass.
Check element in the the sight glass. (Green is dry - Yellow is wet)
Inspect condenser fan blades.
Open bus heater valves (In winter).
Close bus heater valves (In spring).
Remove or install optional condenser winter guard kit.
f. Annual Inspection and Maintenance
X
X
X
X
X
Inspect electrical panel and terminals. Clean if needed with a high-grade cleaner specifically formulated for
this purpose.
Tighten all electrical connections at terminal boards and at the battery. (Refer to Par. 4.11)
Inspect Evaporator drain pan. (Clean if needed)
Check pressure switch operation.
Check evaporator roof mounting and sealing.
Check condense r mounting, fan guards, and screen/grill.
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