my danfoss-randall time clock 102 is not working ,can I swap it for a 103 ,do I need to chnge some of the wiring

Heinz H, April 2009

I suspect that you will have problems...

Here's an excellent compatibility list from Invensys that gives pin-out lists...

http://www.heatweb.com/pdf/Invensys/Programmer%20Compatibility%20Chary.pdf

It shows both 102 & 103 having Neutral and Live on connectors 5 & 6 respectively but there the similarity ends

102 1 = H/W 0n - 2 = C/H On

103 1 = On - 2 = Spare - 3 = Common

They describe the 102 as a Programmer and the 103 as a Timeswitch.

Good luck...

Peccavi, April 2009