9
Defrost sensor fault (E2)
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 E2 in the alarm menu.
Possible causes are:
•
Faulty defrost sensor
• Defrost sensor terminals badly connected.
Condenser Sensor Fault (4)
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 E4 in the alarm menu.
Possible causes are:
•
Faulty condenser sensor
• Condenser sensor terminals badly connected.
Condenser Temperature Alarm (H4)
If the condensing temperature exceeds the factory pre set value (not adjustable) the red LED, buzzer and remote
alarm relay are activated: The alarm code H4 is displayed in the alarm menu.
Possible causes are:
•
Dirty condenser
• Condenser fan not running
• Front cover not fitted
• Obstructed condenser air inlet
TROUBLE SHOOTING
1) Compressor stops. There is an internal over temperature device (Klixon) that stops the compressor each time the
admissible temperature of the motor windings is exceeded.
Possible causes are:
• Insufficient ventilation to the compressor
• Mains voltage anomaly
• Faulty condenser fan
The device will re-set automatically when the windings cool down.
2) Formation of ice on evaporator coil impeding airflow.
Possible causes are:
• Excessive door openings
• Door left open for long periods
• Evaporator fan/s faulty
• Door switch faulty (if fitted)
• Faulty defrost heater (if fitted)
• Faulty hot gas solenoid valve (if fitted)
• Pre set defrost routine not sufficient to clear evaporator of ice build up.
• Decrease the time interval between defrosts.
3) Display does not illuminate.
• Is their power to the unit?
• Is the mains cable connected correctly?
• Have the fuses in the electrical panel blown?
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