please find here below an excerpt of different communication attempts with mount. It is pretty strange that it does not work for me, while it works for you. Can you check if the firmware version is the same? (this should not matter much but who knows...).
I comment by blocks, for an easier interpretation.
So, first, connection:
DEBUG 58.127398 sec : Testing telescope connection using ACK...
DEBUG 58.129876 sec : Testing successful!
DEBUG 58.129933 sec : Checking Pulsar version ...
SCOPE 58.129951 sec : CMD <:YV#>
SCOPE 58.241288 sec : RES <PULSAR V5.60a ,2016.01.04. > (1 attempts)
INFO 58.241354 sec : 5.60a 2016.01.04
INFO 58.241364 sec : Pulsar2 is online. Retrieving basic data...
DEBUG 58.241375 sec : The mount is already tracking.
SCOPE 58.241653 sec : CMD <#:GR#>
SCOPE 58.352025 sec : RES <00:00:01> (1 attempts)
SCOPE 58.352065 sec : CMD <#:GR#>
SCOPE 58.463023 sec : RES <00:00:01> (1 attempts)
SCOPE 58.463081 sec : VAL [0.000277778]
SCOPE 58.463090 sec : CMD <#:GD#>
SCOPE 58.573946 sec : RES <+00:00:00> (1 attempts)
SCOPE 58.574021 sec : VAL [0]
SCOPE 58.574033 sec : CMD <#:YGN#>
SCOPE 58.684952 sec : RES <0> (1 attempts)
SCOPE 58.685016 sec : VAL [0]
SCOPE 58.685042 sec : CMD <#:YGP#>
SCOPE 58.795951 sec : RES <0,0> (1 attempts)
SCOPE 58.796015 sec : CMD <#:YGQ#>
SCOPE 58.906827 sec : RES <1> (1 attempts)
SCOPE 58.906889 sec : VAL [1]
SCOPE 58.906905 sec : CMD <#:YGR#>
SCOPE 59.017800 sec : RES <1,1> (1 attempts)
SCOPE 59.017907 sec : CMD <#:Gt#>
SCOPE 59.128828 sec : RES <+43?41:59> (1 attempts)
SCOPE 59.128876 sec : VAL [+43:41]
SCOPE 59.128892 sec : CMD <#:Gg#>
SCOPE 59.239824 sec : RES <352?44:12> (1 attempts)
SCOPE 59.239886 sec : VAL [+352:44]
SCOPE 59.239923 sec : CMD <#:GL#>
SCOPE 59.351051 sec : RES <13:35:32> (1 attempts)
SCOPE 59.351105 sec : VAL [13:35:32]
SCOPE 59.351114 sec : CMD <#:GC#>
...
note a few "?" in the displayed (or received) values.
Then, setting UT and coordinates both fail:
...
SCOPE 60.793681 sec : CMD <#:GD#>
SCOPE 60.904585 sec : RES <+00:00:00> (1 attempts)
SCOPE 60.904650 sec : VAL [0]
DEBUG 60.904700 sec : New JD is 2457769.000000
SCOPE 60.904715 sec : CMD <#:SL 13:35:33#>
SCOPE 61.015565 sec : RES <1>
SCOPE 61.015625 sec : CMD <:SC 01/15/17#>
SCOPE 61.015649 sec : RES <#>
ERROR 61.015661 sec : Error setting UTC date.
SCOPE 61.015734 sec : CMD <#:Sl 352:39#>
SCOPE 61.126824 sec : RES <1>
SCOPE 61.126872 sec : CMD <#:St 043:42#>
SCOPE 61.126893 sec : RES <#>
ERROR 61.126903 sec : Error setting site coordinates
SCOPE 61.905481 sec : CMD <#:GR#>
SCOPE 62.014246 sec : RES <1100:00:01> (1 attempts)
SCOPE 62.014317 sec : VAL [1100]
SCOPE 62.014335 sec : CMD <#:GD#>
SCOPE 62.126989 sec : RES <+00:00:00> (1 attempts)
SCOPE 62.127053 sec : VAL [0]
SCOPE 63.128142 sec : CMD <#:GR#>
SCOPE 63.235202 sec : RES <00:00:01> (1 attempts)
SCOPE 63.235288 sec : VAL [0.000277778]
....
(It also fails to set site coordinates from the control panel)
By clicking in the panel with motion control buttons, I managed to move the mount south. This seems to be working ok:
SCOPE 106.076407 sec : CMD <#:GD#>
SCOPE 106.185024 sec : RES <00:00:01> (1 attempts)
SCOPE 106.185100 sec : VAL [0.000277778]
SCOPE 106.972137 sec : CMD <#:Ms#>
INFO 106.972214 sec : Moving toward South.
SCOPE 107.185376 sec : CMD <#:GR#>
SCOPE 107.185470 sec : RES <+00:00:00> (1 attempts)
SCOPE 107.185508 sec : VAL [0]
SCOPE 107.185524 sec : CMD <#:GD#>
SCOPE 107.294600 sec : RES <00:00:01> (1 attempts)
SCOPE 107.294676 sec : VAL [0.000277778]
SCOPE 108.295727 sec : CMD <#:GR#>
SCOPE 108.295823 sec : RES <-00:00:03> (1 attempts)
SCOPE 108.295862 sec : VAL [-0.000833333]
SCOPE 108.295879 sec : CMD <#:GD#>
SCOPE 108.404508 sec : RES <00:00:01> (1 attempts)
SCOPE 108.404577 sec : VAL [0.000277778]
SCOPE 109.405662 sec : CMD <#:GR#>
SCOPE 109.405772 sec : RES <-00:05:24> (1 attempts)
SCOPE 109.405837 sec : VAL [-0.09]
SCOPE 109.405858 sec : CMD <#:GD#>
SCOPE 109.514373 sec : RES <00:00:01> (1 attempts)
SCOPE 109.514454 sec : VAL [0.000277778]
SCOPE 110.383090 sec : CMD <#:Qs#>
INFO 110.383151 sec : Movement toward South halted.
SCOPE 110.514648 sec : CMD <#:GR#>
SCOPE 110.514744 sec : RES <-00:19:25> (1 attempts)
SCOPE 110.514782 sec : VAL [-0.323611]
SCOPE 110.514792 sec : CMD <#:GD#>
SCOPE 110.624111 sec : RES <00:00:01> (1 attempts)
SCOPE 110.624173 sec : VAL [0.000277778]
...note the here the "?" have disappeared.
Then, I try a couple of times to sync coordinates to another value. It does not work (a single attempt shown here):
Attempt to set side of pier, pole crossing, PEC off. When testing, I had the impression that this did not work, but here I see that it should be ok (RES 0 received). So maybe I'm wrong but I had the impression that the light on the control panel did not turn green. Anyway, I see that there is a :Q command in the middle (slew stop?) I don't know if it's normal: