Removes SMES power failure.

changes exception system to use critical_machine variable on machines.
Tcomms machines and the AI have their areas exempted.
If the PA is assembled, engineering is exempted.

code/modules/power/apc.dm

@@ -1150,6 +1150,14 @@
 
 
 /obj/machinery/power/apc/proc/energy_fail(duration)
+	for(var/obj/machinery/M in area.contents)
+		if(M.critical_machine)
+			return
+	for(var/A in ai_list)
+		var/mob/living/silicon/ai/I = A
+		if(get_area(I) == area)
+			return
+
 	failure_timer = max(failure_timer, round(duration))
 
 

code/modules/power/singularity/particle_accelerator/particle_control.dm

@@ -159,6 +159,7 @@
 	var/turf/T = loc
 
 	assembled = 0
+	critical_machine = FALSE
 
 	var/obj/structure/particle_accelerator/fuel_chamber/F = locate() in orange(1,src)
 	if(!F)
@@ -189,6 +190,7 @@
 		return 0
 
 	assembled = 1
+	critical_machine = TRUE	//Only counts if the PA is actually assembled.
 	return 1
 
 /obj/machinery/particle_accelerator/control_box/proc/check_part(turf/T, type)

code/modules/power/smes.dm

@@ -29,7 +29,6 @@
 	var/input_level = 50000 // amount of power the SMES attempts to charge by
 	var/input_level_max = 200000 // cap on input_level
 	var/input_available = 0 // amount of charge available from input last tick
-	var/failure_timer = 0
 
 	var/output_attempt = 1 // 1 = attempting to output, 0 = not attempting to output
 	var/outputting = 1 // 1 = actually outputting, 0 = not outputting
@@ -44,7 +43,6 @@
 
 /obj/machinery/power/smes/New()
 	..()
-	smes_list |= src
 	var/obj/item/weapon/circuitboard/machine/B = new /obj/item/weapon/circuitboard/machine/smes(null)
 	B.apply_default_parts(src)
 
@@ -184,7 +182,6 @@
 		cell.charge = (charge / capacity) * cell.maxcharge
 
 /obj/machinery/power/smes/Destroy()
-	smes_list -= src
 	if(ticker && ticker.current_state == GAME_STATE_PLAYING)
 		var/area/area = get_area(src)
 		message_admins("SMES deleted at (<A HREF='?_src_=holder;adminplayerobservecoodjump=1;X=[x];Y=[y];Z=[z]'>[area.name]</a>)")
@@ -254,9 +251,6 @@
 
 	if(stat & BROKEN)
 		return
-	if(failure_timer)	// Disabled by gridcheck.
-		failure_timer--
-		return
 
 	//store machine state to see if we need to update the icon overlays
 	var/last_disp = chargedisplay()
@@ -347,18 +341,14 @@
 /obj/machinery/power/smes/ui_interact(mob/user, ui_key = "main", datum/tgui/ui = null, force_open = 0, \
 										datum/tgui/master_ui = null, datum/ui_state/state = default_state)
 	ui = SStgui.try_update_ui(user, src, ui_key, ui, force_open)
-
 	if(!ui)
 		ui = new(user, src, ui_key, "smes", name, 340, 440, master_ui, state)
 		ui.open()
-	if(ui)
-		ui.set_autoupdate(state = (failure_timer ? 1 : 0))
 
 /obj/machinery/power/smes/ui_data()
 	var/list/data = list(
 		"capacityPercent" = round(100*charge/capacity, 0.1),
 		"capacity" = capacity,
-		"failTime" = failure_timer,
 		"charge" = charge,
 
 		"inputAttempt" = input_attempt,
@@ -379,9 +369,6 @@
 	if(..())
 		return
 	switch(action)
-		if("reboot")
-			failure_timer = 0
-			update_icon()
 		if("tryinput")
 			input_attempt = !input_attempt
 			log_smes(usr.ckey)
@@ -436,7 +423,6 @@
 			if(.)
 				output_level = Clamp(target, 0, output_level_max)
 				log_smes(usr.ckey)
-	return 1
 
 /obj/machinery/power/smes/proc/log_smes(user = "")
 	investigate_log("input/output; [input_level>output_level?"<font color='green'>":"<font color='red'>"][input_level]/[output_level]</font> | Charge: [charge] | Output-mode: [output_attempt?"<font color='green'>on</font>":"<font color='red'>off</font>"] | Input-mode: [input_attempt?"<font color='green'>auto</font>":"<font color='red'>off</font>"] by [user]", "singulo")
@@ -456,9 +442,6 @@
 	log_smes("an emp")
 	..()
 
-/obj/machinery/power/smes/proc/energy_fail(duration)
-	failure_timer = duration
-
 /obj/machinery/power/smes/engineering
 	charge = 1.5e6 // Engineering starts with some charge for singulo