Pre Tripping

The PTI

Pre Trip Inspections (PTI's) are a form of maintenance service which are required between each voyage to ensure a high standard of operation is maintained for each cargo being transported. This is essential considering the volume and expense each reefer carries on a single voyage.

The PTI's Feliba carry out follow numerous controlled steps to ensure they are at or above this standard and that the machinery is at the best operational capacity. Below is a simplified representation of what Feliba's technicians follow whilst performing a Pre Trip Inspection.

Prior To Power Up, Check..

Condition of cargo space and insulation
Door condition, gaskets and fasteners
Mounting of machinery frame on container
Mounting of fan motors
Mounting of compressor and level of compressor oil
Length and condition of mains power cable and plug
Insulation resistance of the compressor, motors, heaters & solenoids
Electrical terminals for corrosion or loose connections
State of the electrical box & relative components
For missing or damaged components
Drains for blockages or breakages
Partlow clock status (uncommon these days)

Whilst On Power, Check..

Function of relays, contactors and connectors
Controller ID, date, time and software version
Data logger status
Current draw on compressor, motors, heaters and solenoids
Unusual vibration or noises of moving components
Compressor oil level
Operating pressures, both suction and discharge at 0.0 °C
Operating pressures, both suction and discharge at -18.0 °C
Refrigerant level and state
Return and supply temperature sensors
Difference across the evaporator coil
Superheat on expansion valve
Pull down time to 0.0 °C and -18.0 °C
Modulation (or hot-gas) at 0.0 °C
Water switches
Defrost operation, both manual and automatic
Calibration of temperature sensors
Status indictor lights