Maritime Geothermal ATF-45, Installation And Service Manual

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1-Jun-2018 Page 39 002000MAN-01
BOARD FAULTS Tab:
This tab shows hardware faults that could occur. If one of these faults occurs there may be a problem with the control board hardware
or with the LCD Display and buttons.
NOTE: If a Board Fault occurs, try cycling the power to the heat pump. Turn the power off for 10 seconds and then back on
again. If the fault persists then there is most likely a problem with the hardware and the board will need to be
replaced.
Digital Inputs:
A failure has occurred and the Control Board may no longer respond to the digital input signals.
Digital Outputs:
A failure has occurred and the digital outputs may no longer work properly.
PWM Outputs:
A failure has occurred and the PWM / 0-10VDC outputs may no longer work properly.
Analog to Digital:
A failure has occurred and the data from the A/D converter may be corrupt resulting in erratic data values.
Real Time Clock:
A failure has occurred, system time / date may no longer be valid, all time stamped data may be corrupt.
Flash Memory:
A failure has occurred stored data may be corrupt. It may be possible to correct this by using the menu item
Tools—Reset to Factory Defaults
. If this clears the fault then the system configuration will have to be setup
again.
Menu Buttons:
A failure has occurred and the Control board may no longer respond to menu button keypresses. Try turning off the
power, disconnecting and reconnecting the cable between the LDC Display board and the Control Board and then
turning the power back on again. If this does not work then either the LDC Display board, the cable or the driver
section of the Control Board may be faulty.
LCD Display:
A failure has occurred and display may show erratic data, no data or may not turn on at all. Try turning off the
power, disconnecting and reconnecting the cable between the LDC Display board and the Control Board and then
turning the power back on again. If this does not work then either the LDC Display board, the cable or the driver
section of the Control Board may be faulty.
Temperature Sensors:
A failure has occurred or the sensor is disconnected. Greyed out sensors do not to apply to the
system as configured. Some sensors may be optional, go to the Configuration Page to enable/disable them.
IMPORTANT NOTES: The heat pump will not operate if the Outdoor Ambient probe (HTS) is faulty or disconnected. The
auxiliary will continue to operate but it’s sepoint value may be reduced if using the Outdoor Reset function.
If the Indoor OUT (I_OUT) probe is faulty or disconnected, neither the heat pump nor the auxiliary will operate
if using Setpoint Control. They will continue to operate under Signals or BACnet control.
Fault Indicators
Greyed out do not apply.