Commissioning; Troubleshooting - Gram PRIMA-BOX GM1 Bedienungsanleitung

WARNING: On first starting, the monitor has a time count of 7 minutes. It is important to
leave the unit connected to the mains but in the OFF condition for the duration of the
count.
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 alarm code E1. Possible causes are:
- faulty room sensor
- badly connected room sensor
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. ; the alarm code E2 is displayed in the
alarm menu as indicated above.Possible causes are:
- faulty defrost sensor
- badly connected defrost sensor
Condenser Sensor Fault (E4)
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 E4 is displayed in the
alarm menu as indicated above.
Possible causes are:
- faulty condenser sensor
- badly connected condenser sensor
Condenser Temperature Alarm (H4)
If the condensing temperature exceeds a factory pre set value, red led and buzzer are
activated. The alarm code H4 is displayed in the alarm menu as indicated above. Possible
causes are:
- dirty condenser

COMMISSIONING

Having made the pre start up checks as described in section 4, connect to mains supply.
The display will be lit and OFF appears on the screen.
If the unit has a preheating cycle it is necessary to keep it in this condition for at least 3
hours.
If the unit has a voltage monitor, it is necessary to keep it in this condition for at least 7
minutes.
Set the required room temperature as described in para. 5.1 above
Turn unit ON using the ON/OFF key (9).

TROUBLESHOOTING

1) Compressor stops. There is an internal over temperature device which stops the
compressor each time the admissible temperature of the motor windings is exceeded.
Possible causes are:
- insufficient ventilation to unit
- mains voltage anomaly
- faulty condenser fan motor
The device resets itself automatically when the windings cool down.
2) Formation of ice on evaporator coil impeding regular air flow. Possible causes are:
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