Chapter 4: Maintenance & Fault Finding 394 Maintenance & Fault FindingCleaning the displayCAUTION:Take care when cleaning the display. Do not wipe the displayscreen with a dry cloth as this could scratch the screen coating.Do not use acid, ammonia based or abrasive products.• Never use chemical or abrasive materials to clean the control unit.If the control unit is dirty, wipe it with a clean, damp cloth.• In certain conditions, condensation may appear inside the displayscreen. This will not harm the unit, and you can clear it byswitching on the illumination for a short time.EMC advice• When powered up, all electrical equipment produceselectromagnetic fields. These can cause adjacent pieces ofelectrical equipment to interact with one another, with aconsequent adverse effect on operation.• To minimize these effects and enable you to get the best possibleperformance from your Raymarine equipment, guidelines aregiven in the installation instructions, to enable you to ensureminimum interaction between different items of equipment, i.e.ensure optimum Electromagnetic Compatibility (EMC).• Always report any EMC-related problems to your nearestRaymarine dealer. We use such information to improve ourquality standards.• In some installations, it may not be possible to prevent theequipment from being affected by external influences. In generalthis will not damage the equipment but it can lead to spuriousresetting action, or momentarily may result in faulty operation.
