Cd18 Software Revision Number

Cd18 displays the software revision number

Cd17 Relative Humidity (%)

Cd17 displays the humidity sensor (HS) reading, as a percent value.

Cd16 Compressor Motor / Unit Run Time Hour Meter

Unit Run Time Hour Meter

Cd16 displays the compressor motor hours. Press the ENTER key while in Cd16 to view unit run time. Total hours are recorded in increments of 10 hours (i.e., 3000 hours is displayed as 300).

Press and hold the ENTER key for 5 seconds to reset the Compressor Motor Hour Meter display. The Unit Run Time Hour Meter cannot be reset.

Cd15 Digital Unloader Valve / Digital Loader Valve

Cd15 displays the status of the digital unloader valve (DUV) as Open or Closed.

For PrimeLINE EDGE units (571-3xx models) the status of the digital loader valve (DLV) can also be displayed. To display the DLV status, press and hold the ENTER key for 3 seconds and continue to hold. When the key is released, the display switches back to the DUV.

Cd14 Compressor Discharge Pressure

Cd14 displays the compressor discharge pressure transducer (DPT) reading.

Cd12 Evaporator Pressure / Compressor Suction Pressure

Cd12 displays the evaporator pressure transducer (EPT) reading in the right display. Press the ENTER key to show the reading for the suction pressure transducer (SPT) in the left display and the EPT in the right display.

Cd11 Compressor Discharge Temperature

Cd11 displays the compressor discharge temperature Sensor (CPDS) reading, using compressor dome temperature.

Cd10 Evaporator Temperature

Cd09 displays the ambient temperature sensor (AMBS) reading.

Cd09 Ambient Temperature

Cd09 displays the ambient temperature sensor (AMBS) reading.

Cd08 Main Power Frequency

Cd08 displays the value of the main power frequency in Hertz. The frequency displayed will be halved if either fuse F1 or F2 is bad (alarm code AL021).

Cd07 Main Power Voltage

Cd07 displays the main supply voltage.

Cd04 Cd05 Cd06 Line Current Phase A B C

These codes display the measured of Phase A (Cd04), B (Cd05) and C (Cd06) in amperes. The current sensor measures current on two legs. The third unmeasured leg is calculated based on a current algorithm. The current measured is used for control and diagnostic purposes.

For control processing, the highest of the Phase A and B current values is used for current limiting purposes. For diagnostic processing, the current draws are used to monitor component energization.

Whenever a heater or a motor is turned ON or OFF, the current draw increase/reduction for that activity is measured. The current draw is then tested to determine if it falls within the expected range of values for the component.

Failure of this test will result in a pre-trip failure or a control alarm indication.

Cd03 Compressor Motor Current

Cd03 displays the current value passing through the compressor motor leg T3. The current sensor measures current draw in lines L1 & L2 by all of the high voltage components. It also measures current draw in compressor motor leg T3.

Cd01 Capacity Modulation (%)

Cd01 displays the DUV percent closed. The right display reads 100% when the valve is fully closed. The valve will usually be at 10% on start up of the unit except in very high ambient temperatures.