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14 Care and maintenance
Remove dust and grime with a soft dry cloth or silicon-treated cloth. Do not use
cleaning agents as these may damage the plastic parts.

14.1 Firmware updates

The flash unit’s firmware can be updated through the USB port and adjusted
to the technical requirements of future cameras (Firmware Update).
For more information, visit the Metz homepage at www.metz.de.
14.2 Reset
The flash unit can be reset to the factory settings when delivered. Press the
ìModeî button for ca. 5 seconds. After ca. 5 seconds „rES“ (= Reset) is shown in
the display and the flash unit is reset to the settings as delivered..
This will not affect the firmware updates for the flash unit.

14.3 Flash capacitor forming

The flash capacitor built into the flash unit undergoes physical change if the unit
is not switched on for a prolonged period. For this reason it is necessary to
switch the unit on for approximately 10 minutes at least once every three months.
The power supplied by the power source must be sufficient to cause the flash
readiness indicator to light up no more than one minute after the flash unit is
switched on.
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15 Troubleshooting
Should the flash unit fail to function properly or meaningless content
appear on the flash unit display panel, switch the flash unit off with the
main switch for approximately 10 seconds. Check the camera settings
and make sure the foot of the flash unit is mounted correctly in the
camera’s accessory shoe.
Replace the batteries with new or freshly charged batteries.
The flash unit should function normally again once it is switched back on. If this
is not the case, contact your local dealer.
Below is a list of some of the problems that may occur when the flash unit is
used. For each item, possible causes and remedies for the problem are listed.
No maximum flash range indication appears on the display panel.
• There has been no exchange of data between the flash unit and the camera.
Tap the camera’s shutter release.
• The main reflector is not in normal position.
The AF measuring beam of the flash unit is not activated.
• The flash unit is not ready for firing.
• The camera is not in Single AF mode (S-AF).
• The camera supports only its own internal AF measuring beam.
• Some cameras support the AF measuring beam in the flash unit only with the
camera’s central AF sensor. If a peripheral AF sensor is selected, then the
AF measuring beam will not be activated in the flash unit. Activate the central
AF sensor.
The reflector position is not automatically adjusted to the current zoom position
of the lens.
• The camera does not transfer data to the flash unit
• There is no exchange of data between the flash unit and the camera. Tap the
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