Maritime Geothermal WH-Series, Installation And Service Manual

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Page 22 002028MAN-01 1-Oct-2015
View—Alarms: The alarms page has three tabs, the first shows the current alarm status, number of alarms, high and low refrigeration
alarm cutout values as well as the short cycle timer. The second tab shows a list of alarms that have occurred since the PC APP has
been operating (this will be lost when the PC is disconnected from the controller board.) The third tab is a list of board hardware faults.
RESET button: This will reset all alarms and alarm counts, including a permanent alarm.
WARNING: Repeated resets can freeze and rupture the heat exchanger, ruining the heat pump and voiding the war-
ranty.
The source of the alarm should be determined before resetting the unit if possible or during operation after a reset.
!
ALARMS Tab (see screen shot on next page):
NOTE: Alarms that are greyed out are not applicable to the system setup and are not monitored by the control board.
NOTE: Refer to Alarms and Faults screenshot below to see which alarms have a count.
Alarms without a count:
These alarms only occur one time at which point they immediately create a Permanent Alarm .
Alarms with a count: When an alarm occurs the compressor will stop, the alarm count will increase and the Short Cycle Timer
will start. When the SC Timer expires the compressor will re-start. If no further alarms occur within Count
Reduce Time , the alarm count will be reduced by 1. If another alarm occurs within Count Reduce Time
(see Configuration Page ) the count will increase by 1. If alarms continue to occur, when the alarm count
reaches the Maximum Count value a Permanent Alarm will occur.
Master Alarm: This alarm occurs when any alarm occurs. It is used to simply indicate that there is an alarm.
Permanent Alarm: The compressor will be locked out until the Permanent Alarm is manually reset either by cycling the
power or clicking on the RESET button
Low Pressure:
A low pressure alarm occurs when the suction pressure drops to or below the Low Pressure Cutout
value. The low pressure is checked just before a compressor start, if it is OK the compressor will start,
otherwise an alarm will occur. When the compressor starts, the low pressure alarm will be ignored for the
number of seconds that Low Pressure Ignore is set to, after which the low pressure alarm will be
re-enabled. This allows a dip in suction pressure below the cutout point during startup without causing a
nuisance alarm.
High Pressure: A high pressure alarm occurs when the discharge pressure rises to or above the High Pressure Cutout
Value.
Compressor Monitor: This alarm occurs when the compressor protection module sends a fault signal to the control board,
generally due to the compressor windings overheating.
Compressor Status: This alarm occurs when there is a current draw on the compressor but no call for the compressor to be on
(ie welded contactor) or when there is a call for the compressor to be on but there is no compressor current
draw (ie manual high pressure control is open or contactor failure). Requires current sensor accessory.
Phase Monitor: This alarm occurs when the Phase Monitor detects a fault condition and sends a fault signal to the control
board. For three phase units only and requires Phase Monitor accessory.
Loss of Charge: This alarm occurs if both the low pressure and high pressure sensors are below 30PSIG (207kPa).
Outdoor Flow: This alarm is ignored on compressor start for the number of seconds the Outdoor Flow Ignore on Start is
set to. Alarm monitoring will begin when the timer expires.
Indoor Flow: This alarm is ignored on compressor start for the number of seconds the Indoor Flow Ignore on Start is
set to. Alarm monitoring will begin when the timer expires.