diff --git a/n2vc/k8s_helm3_conn.py b/n2vc/k8s_helm3_conn.py
index bb08f07..107f954 100644
--- a/n2vc/k8s_helm3_conn.py
+++ b/n2vc/k8s_helm3_conn.py
@@ -84,7 +84,12 @@
         """Install a helm chart
 
         :param cluster_uuid str: The UUID of the cluster to install to
-        :param kdu_model str: The name or path of a bundle to install
+        :param kdu_model str: chart/reference (string), which can be either
+            of these options:
+            - a name of chart available via the repos known by OSM
+              (e.g. stable/openldap, stable/openldap:1.2.4)
+            - a path to a packaged chart (e.g. mychart.tgz)
+            - a path to an unpacked chart directory or a URL (e.g. mychart)
         :param kdu_instance: Kdu instance name
         :param atomic bool: If set, waits until the model is active and resets
                             the cluster on failure.
diff --git a/n2vc/k8s_helm_base_conn.py b/n2vc/k8s_helm_base_conn.py
index d446b9b..a4eab4b 100644
--- a/n2vc/k8s_helm_base_conn.py
+++ b/n2vc/k8s_helm_base_conn.py
@@ -371,6 +371,9 @@
 
         return True
 
+    def _is_helm_chart_a_file(self, chart_name: str):
+        return chart_name.count("/") > 1
+
     async def _install_impl(
         self,
         cluster_id: str,
@@ -1954,7 +1957,7 @@
 
     def _split_version(self, kdu_model: str) -> (str, str):
         version = None
-        if ":" in kdu_model:
+        if not self._is_helm_chart_a_file(kdu_model) and ":" in kdu_model:
             parts = kdu_model.split(sep=":")
             if len(parts) == 2:
                 version = str(parts[1])
diff --git a/n2vc/k8s_helm_conn.py b/n2vc/k8s_helm_conn.py
index 8c526f5..5fe624b 100644
--- a/n2vc/k8s_helm_conn.py
+++ b/n2vc/k8s_helm_conn.py
@@ -110,11 +110,12 @@
         happen before any _initial-config-primitive_of the VNF is called).
 
         :param cluster_uuid: UUID of a K8s cluster known by OSM
-        :param kdu_model: chart/ reference (string), which can be either
+        :param kdu_model: chart/reference (string), which can be either
             of these options:
             - a name of chart available via the repos known by OSM
-            - a path to a packaged chart
-            - a path to an unpacked chart directory or a URL
+              (e.g. stable/openldap, stable/openldap:1.2.4)
+            - a path to a packaged chart (e.g. mychart.tgz)
+            - a path to an unpacked chart directory or a URL (e.g. mychart)
         :param kdu_instance: Kdu instance name
         :param atomic: If set, installation process purges chart/bundle on fail, also
             will wait until all the K8s objects are active