🔴 Error Code: P15
🔹 Subcode: 01
🔹 System: TOSHIBA VRF

📌 Meaning of Error P15 / Subcode 01

P15 / Subcode 01 indicates:

➡️ High Compressor Discharge Temperature
(Compressor protection due to high discharge temperature)

This means the compressor discharge pipe temperature has become too high, so the system stops the compressor to protect it from damage. ⚠️

🔧 Possible Causes

1️⃣ Dirty Outdoor Condenser Coil

• Dust and dirt block heat rejection, causing temperature rise.

2️⃣ Outdoor Fan Problem

• Fan not working or running at low speed.

3️⃣ Low Refrigerant (Gas Leakage)

• Refrigerant shortage increases discharge temperature.

4️⃣ Overcharged Refrigerant

• Excess refrigerant can also cause high pressure and temperature.

5️⃣ Discharge Temperature Sensor Fault

• Sensor damaged or wiring loose.

6️⃣ High Cooling Load

• Too many indoor units running at the same time.

7️⃣ Expansion Valve (EEV) Problem

• Improper refrigerant flow.

🛠️ Troubleshooting Steps

✔️ Clean the outdoor condenser coil thoroughly.
✔️ Check outdoor fan operation and speed.
✔️ Measure refrigerant pressure.
✔️ Inspect for gas leakage.
✔️ Check discharge temperature sensor resistance.
✔️ Verify airflow and system load.

⚠️ Important Technician Tips

• If the compressor discharge pipe is extremely hot, stop the system immediately.
• Repeated P15 errors can lead to compressor damage.
• Always check error history in service mode.

🎯 Field Experience Tip (Very Common Causes)

In real VRF service work, P15 / Subcode 01 is most commonly caused by:

✅ Dirty outdoor condenser coil
✅ Low refrigerant due to leakage
✅ Faulty discharge temperature sensor