Hi,
I am new to this site, however, I need help.
I own a Carrier ThinLine 40’ Reffer Container and the drainage I believe is clog or not working because after running for two days there is heavy and solid ice buildup behind the back panel which encloses the air flow sensors causing an alarm “DAL 70” and it also prevents the container from reaching to set temperature.
Can any one guide me on how to fix this, or, were can I get a detail drawing of the drainage system.
Thank you in advance.

Regards,
Joseph Ballah.