How much and what type of gas is contained in the Green Box industrial chiller?

The type of gas inserted in the refrigeration circuit of your industrial chiller and the related kgs are indicated on the silver plate (see the photo).

High pressure alarm HP

Cause
– insufficient amount of air passing through condenser
– condensation air temperature too high
– condensers dirty or clogged
– dirty condenser or filters
– the axial fan doesn’t work

Solution
– make sure that all buffers panels of the unit’s condenser compartment are properly installed
– make sure that anything is placed on the air intake points of the unit and check that the fins are not crushed
– remove filth and dust from the condenser fins which
– manual reset of the high pressure switch and reset the alarm in the controller
– if the fan doesn’t work, contact GB service
– if the cause of alarm is not found, contact GB service

Low pressure alarm LP

Cause
– evaporator obstructed
– insufficient water circulation in the evaporator
– gas filter clogged
– gas missing in refrigeration circuit
– expansion valve out of calibration or faulty
– traces of water in the gas circuit
– pressure switch faulty
– gas circuit solenoid valve faulty

Solution
– clean the heat exchanger follow the instruction reported in the operation handbook
– check the water flow rate and verify that the by-pass inside the unit is set correctly
– contact GB service
– contact GB service
– contact GB service
– contact GB service
– contact GB service
– contact GB service

Anti-freeze alarm AB1AC / A1

Cause
– the probe is not positioned or connected properly
– insufficient water circulation in the evaporator

Solution
– check the position of the probe and its correct connection to the controller
– check the water flow rate in the evaporator
– if the cause of alarm is not found, contact GB service

Evaporator flow alarm AEFL / FL

Cause
– there isn’t water circulation
– the water flow rate is too low
– there is air in the hydraulic circuit
– the filter installed at the unit inlet is dirty
– the pump circulation breaker alarm appears
– water is missing in the hydraulic circuit

Solution
– make sure that the pump has been satrted and works correctly
– verify that the adjusting valve upstream and downstream the recirculation pump is open
– make sure the automatic air bleed valves have been installed in the higher part of the hydraulic circuit and check the air bleed valve inside the unit installed on the storage tank
– stop the unit, close the valves installed upstream and downstream the filter, remove and clean it
– reduce the water flow rate by acting in the valve installed in the outlet pipe and verify if the grille in the pump is clean
– verify the cause and refill the circuit

Compressor circuit breaker alarm CTR / TC

Cause
– a compressor overload device has tripped
– the integral protective device of compressor trips

Solution
– if possible solve the issue and contact GB service
– contact GB service

Incorrect phase sequence (electronic controller display does not turn on)

Cause
– Incorrect phase sequence in the power supply
– the fuses of the primary &/or secondary circuit could be faulty

Solution
– disconnect power supply and swap two phases
– switch off the unit and check the fuses replacing one or more if necessary

For any other alarm / display message, contact GB service.

by phone: +390499703319 (int.2)

by email: service.gbx@frigel.com