Foster Solo Plus, Руководство по обслуживанию

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8
CONTROLLER ALARMS AND FAULT FINDING.
When an alarm condition occurs the unit will display an alarm code ERR (this will differ according to the nature of
the alarm):
• Alarm LED will illuminate (4)
• Buzzer will sound (if remote alarm is fitted)
• The alarm relay (for remote alarms) will be energised.
The pressing of any key will mute the alarm buzzer.
When the alarm is muted the LED will continue to flash for as long as the alarm condition persists.
To display the alarm code it is necessary to enter the alarm menu:
Press the ENTER key (10) for more than three seconds. FnC will be displayed. Press the DEFROST/UP key (8)
until AL is displayed and then press ENTER (10). At this point the alarm code will be displayed indicating the nature
of the alarm.
High Temperature Alarm (HI)
The red LED, buzzer and remote alarm relay are activated; the alarm code HI is displayed in the Alarm Menu.
The cause can be:
• Product to warm
• Excessive door openings
• Excessive product load
• Unit malfunction
Low Temperature Alarm (LI)
The red LED, buzzer and remote alarm relay are activated; the alarm code LI is displayed in the Alarm Menu.
The cause can be:
• Malfunction of the electronic controller
High Pressure Alarm (EO)
Each time the pressure switch trips, the buzzer and red LED are activated. If more than ten trips occur during a
1-hour period then the unit will shut down automatically. The remote relay will be activated and the label
ERR will
flash on the display alternating with the room temperature. The alarm code EO is displayed in the Alarm Menu.
The cause can be:
• Dirty condenser
• Condenser fan not running
• Front cover not fitted
• Obstructed condenser air inlet
• Obstructed condenser air outlet
• Inadequate ventilation
Voltage Monitor Alarm (E8 – only when fitted as an option)
The optional voltage monitor is an electronic device that checks the units’ electrical supply. Should the voltage vary
by +/- 12% the unit will shut down for a period of 6 minutes (not adjustable) before attempting to re-start automatically
providing the voltage has returned to within limits. The red LED, buzzer and remote alarm relay are activated; the
label
ERR will flash on the display alternating with the room temperature. The alarm code E8 is displayed in the
alarm menu.
WARNING: if the Voltage monitor is fitted it is important to note that on start up it has a time delay of seven minutes,
during this period the power should be on with the controller in the OFF position.
Room Sensor Fault (E1)
The red LED, buzzer and remote alarm relay are activated; the label ERR will flash on the display alternating with
the room temperature: alarm code E1 in the alarm menu.
Possible causes are:
• Faulty room sensor.
• Room sensor terminals badly connected.