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F04·06·08·12·13·17·18/H08 Outdoor Unit Temperature Sensor Error
* H08 (temperature sensor for measuring the oil level) will only detect the oil surface with W-Multi.
Re-check the settings if it is not the relevant model.
Setting confi rmation method: The [No.10] – [FirSt] – [Sub] display on the outdoor unit's control board:
It is not a W-Multi if this is set at [Sub 00].
It is set for W-Multi if this is set at [Sub 01] or [Sub 02].
* The two-inlet temperature sensor for the outdoor unit's heat exchanger unit is only connected to the 3WAY.
A F06 message will be issued if the outdoor unit is set as a 3WAY model but is a model other than a 3WAY
model.
In this event, the model setting must be checked and corrected.
Setting confi rmation method: The [No.10] – [2-3] display on the outdoor unit's control board:
Set at 3WAY if set at [02].
Correct this if the outdoor unit is not actually a 3WAY model.
If the setting is correct or if F06 is still issued after the setting has been corrected, refer to (1) and (2)
below and carry out a normal malfunction check.
Error detection method
An outdoor unit temperature sensor error constantly detects any broken wires or short circuits, and an error is
determined when error conditions are met once.
Error conditions are given below.
Display
F04
Compressor outlet temperature sensor
Outdoor heat exchanger inlet temperature sensor
F06
Outdoor heat exchanger 2 inlet temperature
sensor (3WAY only)
F08
Outside air temperature sensor
F12
Compressor inlet temperature sensor
F13
Coolant temperature sensor
F17
Hot water outlet temperature sensor
F18
Exhaust gas temperature sensor
Temperature sensor for oil level measurements
H08
(W-Multi only)
Note 1: Detects severed wires in the compressor's outlet temperature sensor.
When the pressure is more than 1.0 MPa and the compressor's outlet temperature is less than 6°C for 3
consecutive minutes during complete combustion.
Note 2: Detects severed wires in the exhaust temperature sensor.
When the coolant temperature is ≥80°C, the exhaust gas temperature is ≤30°C and the exhaust gas
temperature does not change for 5 minutes during complete combustion.
Troubleshooting
1
Check
1-1 Is the sensor correctly installed at the prescribed location?
installation
2
Poor connection/contact/crimping or broken wire or pinched
Check
2-1
wire in sensor connector and wiring?
wiring
3
Check
Disconnect the sensor connector and measure the resistance
temperature
3-1
value. Is the resistance between the broken wire detection
sensor
value and the short-circuit detection value?
● For work procedure for replacing outdoor main board, see "5. Reference Document".
● For board and Electrical Wiring Diagram, see Chapter 6.
• Outdoor main board: page VI-2
• Outdoor power board: page VI-3
• Converter board: VI-4
• Indoor control board for DC motor models: page VI-5
• Outdoor Unit Electrical Wiring Diagram: page VI-6
Sensor name
IV–60
Severed wire detection
Short-circuit detection
resistance
(Note 1)
400kΩ or more
400kΩ or more
400kΩ or more
400kΩ or more
62kΩ or more
400kΩ or more
(Note 2)
400kΩ or more
Yes 2-1
No
Repair
Yes Repair wiring
No
3-1
Replace the outdoor
Yes
main board or outdoor
power board.
Replace temperature
No
sensor
resistance
130Ω or less
130Ω or less
130Ω or less
130Ω or less
130Ω or less
22Ω or less
130Ω or less
130Ω or less
130Ω or less
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Troubleshooting
