From IRC:

user@machine:/lightning$ lncli fundchannel 02565b3920e81816040bf477c135cdbfc2c931a11fc41593bd3217b1eb5a399c6f 10000000
(20:22:37) p3tr: { "code" : -1, "message" : "sent ERROR to_self_delay 1201 larger than 432" }
(20:22:40) p3tr: user@machine:/lightning$ lncli fundchannel 02565b3920e81816040bf477c135cdbfc2c931a11fc41593bd3217b1eb5a399c6f 5000000
(20:22:43) p3tr: { "code" : -1, "message" : "sent ERROR to_self_delay 600 larger than 432" }
(20:22:46) p3tr: user@machine:/lightning$ lncli fundchannel 02565b3920e81816040bf477c135cdbfc2c931a11fc41593bd3217b1eb5a399c6f 7500000
(20:22:48) p3tr: { "code" : -1, "message" : "sent ERROR to_self_delay 901 larger than 432" }
(20:22:50) p3tr: { "tx" : "0200000000010125744673...", "txid" : "ac97847d5a070..." }

Looking at the lnd source, it ranges up to 2 weeks depending on the amount in the channel. We don't allow more than 3 days, should we change default?