No. Simply chanting the Navkar Mantra three times is generally not considered a paccakhān.

• Chanting the Navkar Mantra = japa / smaran / vandan
• Paccakhān = a formal vow or renunciation, taken with clear intention and usually with prescribed wording

If you formally resolve: “I will chant the Navkar Mantra three times,” then it becomes a personal vow in spirit, but it is still not the same as a traditional paccakhān given in Jain practice.

So in simple words:

• Yes = devotion and prayer
• No = not automatically a paccakhān

If you want, I can also explain the difference between japa, pratikraman, and paccakhān in simple Jain terms.