A320 captain reported returning to destination airport when they received a nacelle high temperature...

Narrative:

On climb-out engine 1 nac (nacelle) 300 degrees flashed. Also noticed bleed air high pressure valve open on engine 1. Output of intermediate pressure valve showed matched temp and psi comparing engine 1 and engine 2. Leveled at FL250 per ATC. Engine 1 nac message became constant. Reduced thrust on engine 1 and nac temp message went away with almost idle thrust. Suspected bleed air leak since low power was only way to keep nac temp message off. Made decision to return to airport ZZZ. Accomplished overweight landing checklist with estimated landing weight of 160;200 lbs. Uneventful landing with minimal sink rate. Had fire and rescue inspect engine 1 for possible fire damage. No damage noted and taxied to gate. Maintenance personnel met plane and I wrote up engine 1 nac. Maintenance personnel told us not to write up overweight landing due to low sink rate on landing. I should have written up overweight landing according to checklist procedures. First officer did a great job flying the airplane and coordinating with ATC to expeditiously get plane to ZZZ while I coordinated with company through ACARS. All flight attendants did an excellent job of getting cabin ready for precautionary landing.engine 1 high pressure valve was stuck open causing nac message and possible bleed leak.

Original NASA ASRS Text

Title: A320 Captain reported returning to destination airport when they received a nacelle high temperature ECAM warning that was apparently related to a High Pressure bleed valve stuck open.

Narrative: On climb-out Engine 1 NAC (Nacelle) 300 degrees flashed. Also noticed Bleed Air High Pressure valve open on Engine 1. Output of Intermediate Pressure valve showed matched temp and PSI comparing Engine 1 and Engine 2. Leveled at FL250 per ATC. Engine 1 NAC message became constant. Reduced thrust on Engine 1 and NAC temp message went away with almost idle thrust. Suspected bleed air leak since low power was only way to keep NAC temp message off. Made decision to return to Airport ZZZ. Accomplished overweight landing checklist with estimated landing weight of 160;200 lbs. Uneventful landing with minimal sink rate. Had fire and rescue inspect Engine 1 for possible fire damage. No damage noted and taxied to gate. Maintenance personnel met plane and I wrote up Engine 1 NAC. Maintenance personnel told us not to write up overweight landing due to low sink rate on landing. I should have written up overweight landing according to checklist procedures. First officer did a great job flying the airplane and coordinating with ATC to expeditiously get plane to ZZZ while I coordinated with company through ACARS. All flight attendants did an excellent job of getting cabin ready for precautionary landing.Engine 1 High Pressure valve was stuck open causing NAC message and possible bleed leak.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1241285
Time
Date	201502
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Pneumatic Control Valves
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

A320 captain reported returning to destination airport when they received a nacelle high temperature ECAM warning that was apparently related to a high pressure bleed valve stuck open.