Electronic – Cheap PWM Charge controller not charging the battery

I recently got myself a CMG-2430 PWM charge controller(pretty cheap I know) and a 12v deep cycle battery. The problem is that the charge controller doesn't charge the battery when I connect the solar panel. ….I know that is a cheap solar charge controller but I really what to ask you guys about opinion because I might just have missed something simple. Here are all the informations about the solar panel, charge controller and battery and after that I will give some more info about the problem.

Solar panel
Pmax: 20.0 W
Ipmax: 1.20 A
Vpmax: 16.9 V
Isc: 1.24 A
Voc: 21.5 V

Battery
Voltage: 12 V
Capacity: 20 Ah
Initial current: less than 5 A

Solar Charge Controller (CMG-2430)
Voltage: 12V/24V automatic
Current: 30

Now, when there is no sun (or the solar panel is disconnected) it show's the moon symbol and when I connect the solar panel it does change to the sun symbol but shows 0.00 A even in full sun, and when I check the current on the battery it does confirm that is not charging. Maybe you guys have an idea of what could possibly be wrong.

update:

I did find the problem….I finally opened the controller and guess what. …it has a black spot and a burned moosfet near the solar input. ….thanks everyone anyway!