Many users discard the Series 2A because of a blank display. However, the original manual states:
: A flashing "Aux" or status light can indicate that the meter is currently operating on an off-peak load or, in some cases, may signal an internal fault. Troubleshooting Common Issues horstmann radio telemeter series 2a user manual
Horstmann Radio Telemeter Series 2A user manual, Horstmann CentaurPlus C11, Radio Telemeter 2A manual, RTS 2A programming, Horstmann Series 2A troubleshooting, battery replacement CR2032, Economy 7 timer manual. Many users discard the Series 2A because of a blank display