Daikin VRV IV RXTQ-TA / RXTQ-TB error code CE
Infrared presence or floor sensor error, warning
Which models this applies to. Indoor unit
Quick answer
On Daikin VRV IV RXTQ-TA / RXTQ-TB, CE is a fault. It means infrared presence or floor sensor error, warning. A first thing to check: A failed infrared presence or floor sensor.
- Applies to
- Daikin VRV IV RXTQ-TA / RXTQ-TB
- Daikin VRV IV RXTQ heat pump codes · Heat Pump
- Type of code
- Fault
- Urgency: Worth keeping an eye on
- First safe check
- Look at the sensor lens for dust or film, because a dirty lens on an infrared presence sensor produces a fault that looks like a failed sensor.
What CE means on this model
The optional occupancy sensor has reported a fault. The operation lamp stays lit and the unit keeps heating and cooling, but it has lost the sensing that lets it respond to an empty room.
Symptoms you will notice
- Indoor unit shows CE with the operation lamp lit
- Heating and cooling still work
- The unit no longer responds to whether the room is occupied
- The unit runs all day in an empty room
Common causes
The code tells you what the control detected, not which part failed. These are the causes we see most often, roughly in order of likelihood:
- A failed infrared presence or floor sensor
- A wiring or connector fault at the sensor
- A failed indoor unit PCB input for the sensor
- An obstructed or contaminated sensor lens
What you can safely check
These are homeowner-level checks. None of them need you to open a live electrical compartment or work on gas.
- Look at the sensor lens for dust or film, because a dirty lens on an infrared presence sensor produces a fault that looks like a failed sensor.
- Check the connector at the sensor and the wiring back to the indoor unit.
- Confirm the room actually does change temperature and occupancy as expected, because a sensor in a room with a constant heat source will report oddly.
Do not do these
- ×Do not replace the indoor unit PCB for a CE warning before ruling out the sensor and its wiring.
- ×Do not cover the sensor to stop the unit running, since losing occupancy sensing is a feature loss rather than a repair.
When to call a technician
No call needed yet, but write it down
Note the date and the exact code, and watch whether it comes back. If it turns into a repeat fault or starts affecting performance, that is when it becomes worth a technician.
- The refrigerant circuit is sealed and legally requires licensed handling. Opening it without certification releases refrigerant and can put the whole system in violation of regulation, so a low-pressure or high-pressure fault on this equipment is a call-out, not a weekend job.
- If the appliance has stopped mid-cycle, is making a noise you have not heard before, or smells burnt, stop reading here and call. Those are symptoms of something the fault code does not describe well enough.
A technician job.
What it costs to fix
Parts
Presence or floor sensor $80 to $220. Indoor unit PCB $200 to $450.
Labor
One to two hours to diagnose and replace.
DIY or technician
A technician job.
Typical US part and labor ranges, 2026. They vary by region, model and contractor, so treat them as a planning figure, not a quote.
Scope of this code
- Code table
- Daikin VRV IV RXTQ heat pump codes
- Models in scope
- Daikin VRV IV RXTQ-TA / RXTQ-TB
- Checked
- Confirm on your own unit
- Find the model number on the data plate, then check this code in the service manual for that model. Manufacturers revise code tables between model years, and a revised board can renumber a fault.