![Promaster 100SL Troubleshooting Manual Download Page 4](http://html.mh-extra.com/html/promaster/100sl/100sl_troubleshooting-manual_1615937004.webp)
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1. Do not disassemble, open, or repair this speedlight by yourself.
2. Always use batteries of the same type, brand, and age. Always replace all
4 batteries at the same time. Do not combine different types, brands, old,
or new batteries. This could cause the batteries to overheat, leak, or
explode.
3. This product is not water-resistant. Keep it away from rain, snow, and high
humidity areas.
4. Install the batteries in proper orientation as indicated in the battery
chamber. Installing the batteries incorrectly could cause them to overheat,
leak, or explode.
5. If you change the batteries after a period of sustained continuous firing of
the speedlight, the batteries may become warm or hot. This is normal,
however you should be careful when handling these batteries.
6. Always switch the speedlight off before changing batteries.
7. Do not fire the speedlight from a short distance directly into the eyes of
people or animals. This can cause damage to the retina and may even
lead to blindness.
8. Avoid corrosive or flammable substances when cleaning this speedlight.
9. To prevent overheating and damage to the flash head, do not fire more
than 25 continuous flashes in rapid sequence at full power (1/1 level). In
this case the overheating mode will be activated and the flash will shut
down. Allow it to return to normal operating temperature before using.
This takes about 15 minutes.
10.Do not touch the speedlight with wet hands.This could cause an electrical
shock.
11.Remove batteries from the unit before storing.
Precautions