Current Detection Circuit Error

What it means

This code appears on Toshiba residential split air conditioners when the fault code is read with the remote check function. It means the current sensing circuit on the outdoor inverter board is giving an impossible reading, so the board cannot monitor and protect the compressor current. The outdoor unit stops the compressor as a precaution, and the fault usually returns after a restart. The same code can mean something else on other brands, and Toshiba commercial units use different codes.

Models covered: Toshiba residential split air conditioners (RAC) that show a two-character check code through the remote check function; Toshiba commercial units use different codes.

Related codes: 1416041C

Symptoms4

• The outdoor unit stops soon after start, or the compressor does not start.
• The indoor unit lamps blink and code 17 is found on check.
• The fault returns after every restart.
• It sometimes appears after a voltage swing or power cut.

Possible causes5

• A fault in the current sensing circuit on the outdoor inverter board, the most common cause.
• Board components damaged by a voltage surge.
• Moisture, dust or insects on the board.
• Loose connections between parts of the outdoor power circuit.
• A supply voltage problem pushing the reading out of range.

How to diagnose5

1. Read the code with the remote check function: press and hold the check button, then step through the codes with the timer button until the indoor unit beeps continuously; the code shown then is the fault. Steps vary slightly by remote, so follow the owner's manual.
2. Switch off at the breaker for several minutes, restart once and see whether the fault returns.
3. Switch off at the breaker before opening any panel; the outdoor unit and its inverter board keep a dangerous charge for a while after switch-off.
4. The technician inspects the board for burns, moisture or insects and checks the connections.
5. The technician measures supply voltage and tests the current sensing circuit using the manufacturer method.

How to fix4

1. Tighten connections and clean and dry the board.
2. Fix the supply problem and fit a voltage protector.
3. Replace the outdoor inverter board at an authorized service center if the circuit is proven faulty.
4. Run the unit long enough and confirm the code does not return.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low for a connection or supply issue, but this code often ends in an inverter board replacement, putting the cost near the upper end.

Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Prices last updated: September 2026

Frequently asked questions