Resolution

Mute alarm by pressing the alarm button on the DC-3 room control and outdoor unit display panel.

Check the alarm log at the outdoor unit display by pressing the alarm button then the enter button, all alarms can be scrolled through, each alarm has a description in English including a time/date stamp and pressure and/or compressor speed data.

Resolution

Is the compressor delay timer still counting, check at outdoor unit display panel by pressing enter button and scrolling down to a screen that shows C='n' seconds. The default minimum delay between two consecutive starts, default=370 seconds This delay time must not be altered.

Resolution

Is the compressor delay timer still counting, check at outdoor unit display panel by pressing enter button and scrolling down to a screen that shows C=‘n’ seconds. The default minimum delay between two consecutive starts, default=370 seconds This delay time must not be altered.

Resolution

Is the liquid injection EEV fully closed?
If not try manually opening and closing the EEV to remove any debris under the valve seat.
If still leaking pump unit down to pump-down threshold (default=2.2 bar), recover remaining refrigerant from line and check valve seat by unscrewing the valve.

Resolution

•  Has the cold room door been left open?
•  Are the door seals allowing air to pass?
•  Is the defrost temperature initiation temperature and timing set to suit site specific requirements?
•  Is the defrost temperature termination temperature and timing set to suit site specific requirements?
•  Has the maximum defrost time been set to suit site specific requirements?
•  Is defrost terminating by temperature before the maximum defrost time is reached?
•  Has the maximum time between defrosts been set to suit site specific requirements?
•  Is the defrost temperature sensor secured to the return bend of the evaporator and insulated correctly?
•  Is the defrost temperature sensor displaying the correct temperature when measured against an accurate thermometer?

Resolution

Check the connections of each data cable.

Resolution

•  Check the three cables on the DC side of the inverter are correctly connected.
•  Check the three cables on the DC side of the inverter have not been crossed.
•  Check all three phases on the AC side of the inverter have correct voltage.

Resolution

Check power supply at the outdoor unit and DC-3 room control. Reset circuit breaker/s if required.

Resolution

Switch unit on at DC-3 room control and check operation of system.