Automatic Pti - Daikin LXE10E-A14 Service Manual

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3.9.2 Automatic PTI (Pre-Trip Inspection)
G The automatic PTI function is provided so as to ensure correct inspection and to shorten inspection
time.
(1) Appearance inspection of unit
q Physical damage
w Casing insulation through hole area
Drain hose (dust and clogging)
e
r Power cable and plug damage
t Condition of refrigerant piping fasteners.
Condition of each sensor installation
y
u Loose mounting sections
Bolts and nuts ----- Casing frame, compressor, fan motor control box and temperature recorder box
Cable glands ----- Control box
i Conditions of control box cover packing (water-proof) and temperature recorder box cover packing
(water-proof)
Magnetic contactor contact point for burning out.
o
(2) Inspection before unit operation
q Gas leakage inspection
w Power voltage inspection
(3) Starting inspection and operation inspection of safety device and control equipment
Starting
q
Safety device
w
e Control equipment Solenoid valve
(4) Operation in each mode
Pull-down /
q
w Chilled control
e Defrosting
Pull-down /
r
Frozen control
t
(5) PTI report preparation
Inspection whether the starting procedure is proper or not
Inspection for abnormal noise and abnormal vibration
Moisture in the refrigerant ----- This is reinspected at the end of PTI.
Rotating direction of fan motor.
HPS ----- Measurement of the actuating pressure by stopping the condenser
fan motor.
EFM
EV, SMV
0˚C
0˚C Electronic temperature Return, supply air temperature differential, voltage and current
recorder calibration
–18˚C
–18˚C Electronic temperature (Temperature differential and rotating direction)
recorder calibration ON/OFF, voltage and current
(Automatic PTI range)
----- Inspection of operation (open and close) and leakage
----- Speed switchover and rotating direction
----- Inspection of operation (open and close) and leakage
Pull-down time, voltage and current
Defrosting time
Pull-down time, evaporator fan motor speed switchover
Remained frost inspection
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