Eppendorf New Brunswick -86 °C Freezers G - Manual (Page 33)

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HEF® and G -86 °C Freezers — Operating manual
7.2.7 Electrical components
Lamps
Regularly check the indicator lamps:
 Press the ALARM TEST/MUTE key.
All of the indicator lamps should illuminate, and the display should read 8888.
Alarms
Regularly check the alarm:
 Press the ALARM TEST/MUTE key.
The TEMP indicator should illuminate and the audible alarm should sound.
Battery replacement
The YUASA–NP6 V 2.8 Ah battery is mounted on the electrical panel. This is located behind the
right-hand base cover.
To replace the battery:
1. Switch off the mains/power switch and disconnect the mains/power supply.
2. Remove the side cover and the battery clamp securing the battery to the electrical panel.
3. Disconnect the battery terminals.
4. Install the new battery, fixing screws, and the side cover.
5. Reconnect the freezer to the mains/power supply and turn the mains/power switch on (I).
Fuses
Fuses must be replaced by a New Brunswick Scientific approved service engineer. Contact New
Brunswick Service.
WARNING!
Risk of personal injury
 All electrical components that could cause possible ignition of refrigerant vapor during normal
operation have been enclosed in an IP65 enclosure.
 During routine maintenance, care must be taken to avoid any damage to the gaskets and
sealing grommets of these enclosures; also check the gaskets and sealing grommets
routinely to ensure their integrity. Should any damage or deformity be detected, the gasket
and/or sealing grommet must be replaced immediately.
 Failure to observe this safety warning will invalidate the warranty and could result in a
dangerous situation.
NOTICE!
Risk of material damage
 There are no user controls behind any panels. The removal of any other part or panels from
the freezer by anyone other than a qualified, authorized Service Engineer may invalidate the
warranty.
NOTICE!
Risk of material damage
 Use only a replacement battery of the correct type and part number.
 The battery must be fitted so the terminals correspond to the polarity labels on the electrical
panel.
Hint!
Be certain, when reconnecting the battery, to respect the correct polarity (red is + positive and
black is – negative).
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