Maritime Geothermal ATF-45, Инструкция по установке и обслуживанию

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1-Jun-2018 Page 37 002000MAN-01
View—Alarms:
The alarms page has three tabs; the first shows the current alarm status, number of alarms, high and low re-
frigeration 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 hard-
ware faults.
RESET
button: This will reset all alarms and alarm counts, including a permanent alarm.
ALARMS Tab (see screen shot on next page):
NOTE: Greyed out Alarms in the PC APP 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 permanent 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, gener-
ally due to the compressor windings overheating. (Most residential models do not have compressor pro-
tection modules.)
Compressor Status:
This alarm occurs when there is a current draw on the compressor but no call for the compressor to be on
(i.e. welded contactor) or when there is a call for the compressor to be on but there is no compressor cur-
rent draw (i.e. manual high pressure control is open or contactor failure). Requires current sensor acces-
sory.
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 30 psig (207kPa).
Multiple Defrosts:
This alarm occurs if a second defrost occurs immediately after the defrost disabled timer elapses from a
previous defrost cycle.
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.
IMPORTANT NOTE: The data logging function of the GEN2 Control Board is a very useful tool for troubleshooting alarms. It
provides a history of the unit operation up to and including the time at which the alarm(s) occurred.
Go the Alarms Troubleshooting section of the Trouble Shooting section of the manual to address alarm issues.
WARNING: Repeated resets can freeze and rupture heat exchangers, ruining the heat pump and voiding the
warranty. The source of the alarm should be determined before resetting the unit if possible or during oper-
ation after a reset.