Omni-devices should no longer go and turn themselves off permanently in case of power failure.

code/ATMOSPHERICS/components/omni_devices/filter.dm

@@ -8,14 +8,14 @@
 	var/list/filters = new()
 	var/datum/omni_port/input
 	var/datum/omni_port/output
-	
+
 	use_power = 1
 	idle_power_usage = 150		//internal circuitry, friction losses and stuff
 	active_power_usage = 7500	//This also doubles as a measure of how powerful the filter is, in Watts. 7500 W ~ 10 HP
-	
+
 	var/max_flow_rate = 200
 	var/set_flow_rate = 200
-	
+
 	var/list/filtering_outputs = list()	//maps gasids to gas_mixtures
 
 /obj/machinery/atmospherics/omni/filter/New()
@@ -58,32 +58,26 @@
 	return 0
 
 /obj/machinery/atmospherics/omni/filter/process()
-	..()
+	if(!..())
-	if(error_check())
+		return 0
-		on = 0
+
-	
-	if((stat & (NOPOWER|BROKEN)) || !on)
-		update_use_power(0)	//usually we get here because a player turned a pump off - definitely want to update.
-		last_flow_rate = 0
-		return
-	
 	var/datum/gas_mixture/output_air = output.air	//BYOND doesn't like referencing "output.air.return_pressure()" so we need to make a direct reference
 	var/datum/gas_mixture/input_air = input.air		// it's completely happy with them if they're in a loop though i.e. "P.air.return_pressure()"... *shrug*
-	
+
 	//Figure out the amount of moles to transfer
 	var/transfer_moles = (set_flow_rate/input_air.volume)*input_air.total_moles
-	
+
 	var/power_draw = -1
 	if (transfer_moles > MINUMUM_MOLES_TO_FILTER)
 		power_draw = filter_gas_multi(src, filtering_outputs, input_air, output_air, transfer_moles, active_power_usage)
-	
+
 	if (power_draw < 0)
 		//update_use_power(0)
 		use_power = 0	//don't force update - easier on CPU
 		last_flow_rate = 0
 	else
 		handle_power_draw(power_draw)
-		
+
 		if(input.network)
 			input.network.update = 1
 		if(output.network)
@@ -91,7 +85,7 @@
 		for(var/datum/omni_port/P in filters)
 			if(P.network)
 				P.network.update = 1
-	
+
 	return 1
 
 /obj/machinery/atmospherics/omni/filter/ui_interact(mob/user, ui_key = "main", var/datum/nanoui/ui = null, var/force_open = 1)
@@ -252,7 +246,7 @@
 			P.mode = previous_mode
 			if(P.mode != old_mode)
 				handle_port_change(P)
-	
+
 	update_ports()
 
 /obj/machinery/atmospherics/omni/filter/proc/rebuild_filtering_list()

code/ATMOSPHERICS/components/omni_devices/mixer.dm

@@ -17,10 +17,10 @@
 	var/tag_south_con
 	var/tag_east_con
 	var/tag_west_con
-	
+
 	var/max_flow_rate = 200
 	var/set_flow_rate = 200
-	
+
 	var/list/mixing_inputs = list()
 
 /obj/machinery/atmospherics/omni/mixer/New()
@@ -45,7 +45,7 @@
 					if(tag_west_con && tag_west == 1)
 						P.concentration = tag_west_con
 						con += max(0, tag_west_con)
-	
+
 	for(var/datum/omni_port/P in ports)
 		P.air.volume = ATMOS_DEFAULT_VOLUME_MIXER
 
@@ -86,32 +86,26 @@
 		return 1
 	if(inputs.len < 2) //requires at least 2 inputs ~otherwise why are you using a mixer?
 		return 1
-	
+
 	//concentration must add to 1
 	var/total = 0
 	for (var/datum/omni_port/P in inputs)
 		total += P.concentration
-	
+
 	if (total != 1)
 		return 1
 
 	return 0
 
 /obj/machinery/atmospherics/omni/mixer/process()
-	..()
+	if(!..())
-	if(error_check())
+		return 0
-		on = 0
+
-	
-	if((stat & (NOPOWER|BROKEN)) || !on)
-		update_use_power(0)	//usually we get here because a player turned a pump off - definitely want to update.
-		last_flow_rate = 0
-		return
-	
 	//Figure out the amount of moles to transfer
 	var/transfer_moles = 0
 	for (var/datum/omni_port/P in inputs)
 		transfer_moles += (set_flow_rate*P.concentration/P.air.volume)*P.air.total_moles
-	
+
 	var/power_draw = -1
 	if (transfer_moles > MINUMUM_MOLES_TO_FILTER)
 		power_draw = mix_gas(src, mixing_inputs, output, transfer_moles, active_power_usage)
@@ -122,14 +116,14 @@
 		last_flow_rate = 0
 	else
 		handle_power_draw(power_draw)
-		
+
 		for(var/datum/omni_port/P in inputs)
 			if(P.concentration && P.network)
 				P.network.update = 1
 
 		if(output.network)
 			output.network.update = 1
-	
+
 	return 1
 
 /obj/machinery/atmospherics/omni/mixer/ui_interact(mob/user, ui_key = "main", var/datum/nanoui/ui = null, var/force_open = 1)
@@ -291,7 +285,7 @@
 			P.concentration = new_con
 		else if(!P.con_lock)
 			P.concentration = remain_con
-	
+
 	rebuild_mixing_inputs()
 
 /obj/machinery/atmospherics/omni/mixer/proc/rebuild_mixing_inputs()

code/ATMOSPHERICS/components/omni_devices/omni_base.dm

@@ -28,7 +28,7 @@
 /obj/machinery/atmospherics/omni/New()
 	..()
 	icon_state = "base"
-	
+
 	ports = new()
 	for(var/d in cardinal)
 		var/datum/omni_port/new_port = new(src, d)
@@ -44,16 +44,14 @@
 		if(new_port.mode > 0)
 			initialize_directions |= d
 		ports += new_port
-	
+
 	build_icons()
 
 /obj/machinery/atmospherics/omni/update_icon()
 	if(stat & NOPOWER)
 		overlays = overlays_off
-		on = 0
 	else if(error_check())
 		overlays = overlays_error
-		on = 0
 	else
 		overlays = on ? (overlays_on) : (overlays_off)
 
@@ -64,6 +62,16 @@
 /obj/machinery/atmospherics/omni/proc/error_check()
 	return
 
+/obj/machinery/atmospherics/omni/process()
+	if(error_check())
+		on = 0
+
+	if((stat & (NOPOWER|BROKEN)) || !on)
+		update_use_power(0)	//usually we get here because a player turned a pump off - definitely want to update.
+		last_flow_rate = 0
+		return 0
+	return 1
+
 /obj/machinery/atmospherics/omni/power_change()
 	var/old_stat = stat
 	..()
@@ -173,7 +181,7 @@
 			if(ATM_O2 to ATM_N2O)
 				ic_on += "_filter"
 				ic_off += "_out"
-		
+
 		ic_on = icon_manager.get_atmos_icon("omni", , , ic_on)
 		ic_off = icon_manager.get_atmos_icon("omni", , , ic_off)
 
@@ -285,7 +293,7 @@
 			P.node = null
 			P.update = 1
 			break
-	
+
 	update_ports()
 
 	return null