CIAT POWERCIAT2 LX, Инструкция по эксплуатации

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NA13.47 B EN - 34
13.3 Corrective maintenance
Experience shows that common faults are often easy to fix. There are three such causes in particular:
1. Exchanger fouling.
2. Problems with the hot or cold fluid circuits.
3. Failures of electric components such as relay coils or electrical valves, etc.
Maintenance of micro-channel condensers (§13):
You are recommended to only use water to clean the outer surface of the condenser. If another fluid is used, the following
recommendations must be observed:
- The pH must be between 5 and 9.
- The solution must not contain chlorides, sulphates, copper, iron, nickel or titanium.
- The solution must have been tested to demonstrate it is compatible with aluminium.
You may use a high-pressure cleaner provided that the following recommendations are observed:
- Before cleaning the condensers, remove all soap or cleaning fluid from the unit.
- Clean the condensers by spraying the jets perpendicular to the face area, in an even and regular motion from top to
bottom.
- Do not exceed 900 Psig or a spray angle of 45°.
- The nozzle must be at least 30 cm (12 ") from the condenser.
- Remove any excess water from the condenser.
Faults detected by the safety devices are not necessarily caused by a sudden change in the magnitude being monitored.
Taken regularly, readings should make it possible to anticipate future trips.
Perform the checks listed in the table below if you notice that a magnitude deviates from its normal value and gradually moves
closer to the safety limit.
Faults Probable cause Solution
Suction
pressure
too low
- Presence of air in the cooled fluid circuit - Bleed the cooled circuit
- Insufficient cooled fluid flow rate
- Check that the valves on the cooled fluid circuit open
- Check the rotation direction of the pump and that there is no
cavitation
- Sufficient cooled fluid flow rate but the unit is
too powerful for the circuit load - Recalculate the heat load
- Check the operation of the capacity control system
- Compressor suction valve opening insufficient
(option)
- Open the compressor suction valve fully
- Lack of refrigerant - Find the leak(s) and top up the charge
Excessive
discharge
pressure
- Poor ventilation (suction or discharge blocked),
fans turning in wrong direction.
- Suction air too hot (recirculation)
- Check the operation of the air condenser
- Insufficient opening of the compressor
discharge valve
- Open the compressor discharge valve fully
Discharge
temperature
too high
- Problem on fluid injection system - Check the operation of the injection expansion valve
Oil level
too low
- Oil not topped up after servicing - Top up with oil
Motor fault
- Circuit breakers faulty
- Insufficient power supply voltage
- Insufficient motor cooling
- Replace them
- Check the electrical installation and contact your energy
supplier if necessary
- Make sure that nothing is preventing the motor from being
cooled