P7 0 = Secondary pump is a single speed pump.1 = Secondary pump is a dual speed pump.P8 0 = There is only one secondary pump.1 = There are 2 secondary pumps.Note : if P8 is ON, then by definition both secondarypumps must be single speed.Warning : an improper setting of P7 and P8 canresult in damaged or even destroyed pump motors.It can also cause the controller's printed circuitboard to catch fire. Only trained service personnelshould carry out changes.If unsure please contactACC for more information.DIAGNOSTIC VALUESThe D options are internal diagnostic values and may not be changedfrom the control panel. When a D message is displayed, press the SETkey to see what the associated value is. Here is a brief explanation :D1 What the microprocessor is reading as relative temperature.D2 What the microprocessor is reading from the keys.D3 What the microprocessor is sending to the relays.D4 Accumulated count of temperature errors encountered.D5 Accumulated count of hi limit errors encountered.D6 Accumulated count of heartbeat errors encountered.D7 The firmware revision number.D8 The manufacturing year and week in the form yywwPage 20