Marine Air Systems ECU-Maxx, Руководство по эксплуатации

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PAGE 16
ECU-Maxx VER:10a 12/1/97
ECU-M
AXX
O
PERATIONS
M
ANUAL
P18: High Pressure Freon Switch Disable
This option has been provided to disable High Pressure Faults in heating mode only,
since high head pressure can be an acceptable occurrence while heating. This
function is only valid if P16 is enabled.
P19: Low Pressure Freon Switch Hold-Off Delay
Low Freon pressure conditions can occur during normal operation. To prevent
erroneous LP faults from occurring a hold-off delay is provided. A low Freon
pressure event that lasts longer than the delay time will cause a Low Pressure fault
to occur.
The minimum delay is 60 seconds. The delay range is 1 to 15 minutes, in 1
minute increments. Use the Up and Down buttons to program the desired hold-
off delay. The factory default setting is ten [ 10 ] minutes.
P20: CAL Rod Heater Option
Optional output is provided for an electric strip heater which is placed in the
blower housing. This strip heater is referred to as a CAL rod heater. This
software option is provided to turn the output on when the heater is installed.
P21: Compressor Start Delay
The compressor start delay is included for use in installations where more than
one system is being operated from the same power source. The start delay can
be set at different intervals for each control to allow only one compressor to start
at a time. The units should be staged at least 5 seconds apart.
The minimum delay is 5 seconds. The maximum delay is 135 seconds. Use the
Up and Down buttons to set the delay.
P22: Low Voltage Threshold
The Low Voltage Threshold defines the voltage where the compressor is turned
off. The fault code "L-O" then "A-C" will flash alternately with the line
voltage in the display.
This function allows the ECU-Maxx to be used on a wide variety of line
voltages. The allowable low voltage threshold range is 75 VAC through 100
VAC for 115 Volt units, and 175 VAC through 200 VAC for 220 Volt units. Use
the Up and Down buttons to select the low voltage threshold. The voltage will
appear in the display and represents the actual line voltage.
P23: Sustained Low Voltage Shut Down
OFF - A continued low line voltage condition for 15 seconds will cause the
compressor to turn off while the fault code "LO-AC" alternately flashes with the
line voltage in the display. After 4 successive failures, the system requires a
manual restart. (See Fail-safe Chart for each level action)