Call button systems are designed to function continuously throughout a shift. The majority of problems will have an obvious fix, so it is best to start checking for faults immediately.
Receiver Not Sounding
First, check the volume setting on the receiver for the wireless call button. It is very easy to accidentally lower the volume setting on the receiver, so ensure that the volume dial is turned up to maximum. Also ensure the receiver is plugged in and the outlet is switched on.
Check the Channel Pairing
The wireless call button receiver may have gone out of wireless channel pairing with the wireless call button transmitter. Return both units to their wireless pairing mode as described in the units manual and re-register the wireless call button transmitter with the wireless call button receiver unit. Some wireless call button systems can lose wireless channel pairing with the wireless call button transmitter after a power down/shut down of the wireless call button system.
Signal Dropping in Certain Spots
Interference from nearby other wireless devices (such as cordless phones, other wireless access points, etc.) operating on the same frequency bands is a very common cause of such faults, as noted by Ofcom in relation to wireless systems generally. Try switching to an alternative channel if your receiver supports more than one.
Button Works Sometimes, Not Always
Loose contacts can often cause random faults instead of a complete failure of a call button. Removing the batteries, reinserting them firmly, and cleaning the contacts with a dry cloth can cure this type of problem. Occasionally the battery compartment contacts may need gently bending to improve contact.
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All of these faults can be sorted out within five minutes and are typical everyday problems with the system not working as it should.