12. Periodic inspection
Perform the periodic inspection for the items required
on the following period.
Write down necessary matters to the check sheet on
page 40.
1. Inspection at the time of installation and test run
2. Monthly inspection
3. Six-month inspection
12.1
Inspection at the time of installation and test run
(1) Check seals of refrigeration unit at the sections
passing through a van wall.
Check if the sealant is processed for sure and no
air goes in.
(2) Check the tubing clamp for adequacy.
Make sure tubing does not vibrate during driving.
(3) Check the drain hose for connection and drainage
and the clamp for adequacy.
(4) Check the belt for tension, degree of parallel
(stick-out of interline) and scratches.
Hold center of the belt and adjust its bending up to
about 7 ~ 10mm.
(5) Check if the belt is touching another parts such as
compressor, pulley, belt, tubing and wiring.
Especially check if abnormal sound is heard from
moving parts.
(6) Check if the mounting bolt is tightened more, if
the refrigeration unit, compressor, compressor
head, magnet clutch, tension pulley, bracket, fan
motor and fan are properly installed, if the unit is
deformed or if truck has scraches on the body.
(7) Check for wrong electrical wiring, clamp, loose
terminal.
(8) Check the service valve is opened of refrigerant
system.
(9) Check refrigerant system, oil and gas leakage,
connection part of tubing and installation of
functional parts.
(10) Abnormal sound and vibration
Check the compressor, magnet clutch, motor, fan
and tubing for abnormal sound and vibration.
(11) Inspection of sight glass
Color of the sight glass is to be green and the glass
has to have no excessive bubbles.
(12) Check starting and stopping of compressor,
magnet clutch and fan by thermostat.
(13) Cooling operation
Check display for temperature indication and
dropping of temperature.
(14) Check defrost for operation.
Check it by turning on manual defrost switch.
(15) Check DPS (Dual pressure switch) for operation.
CUT OUT (high): 2.94MPa (30kgf/cm
2
)
(low): 0.20MPa (2.0kgf/cm
2
)
(16) Check power source wiring (ground wire,
insulation resistance) (Type 2 only)
Note:
Insulation resistance measurement method (AC 3-
phase circuit only)
Short-circuit the power source terminal (R.S.T or
power source plug pin) and measure the insulation
resistance between the short-circuited section and
the grounded section by an insulation resistance
tester.
(17) Check the motor drive for operation. (Type 2 only)
(18) Check the buzzer for buzzing. (Type 2 only)
(19) Check the instruction manual.
12.2 Daily inspection
Refer to page 36 except the following items.
(1) Implement the checking items about the engine to
be run.
(2) Confirm that there are no abnormal sound and
vibration.
(3) Check if anything is touching the movable places.
(4) Check the compressor belt for tension, wear and
abnormal sound.
(5) Check if the condenser fan and evaporator fan are
turning.
(6) Check if the temperature indication of the display
is proper.
(7) Check commercial power driving equipment
(motor drive)
• Check the power source cord for damage.
Check if the power box cover is firmly fixed.
Check to see no water is in the plug receptacle.
• Check to see the motor is running and if
abnormal sound is heard during operation.
– 34 –
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