Daikin VRV IV+ Service Manual page 72

2 | Troubleshooting
2.3.46 F9-01 – Branch selector box electronic expansion valve abnormality (high pressure/low
pressure gas pipe)
2.3.47 F9-02 – Branch selector box electronic expansion valve abnormality (suction gas pipe)
Service manual
72
Trigger
After power is supplied,
continuity has not been
detected on the coil for
expansion valve
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Locate the branch selector box by checking indoor unit remote controllers
showing F9 error. Branch selector box that is connected to the indoor unit(s)
that show F9 error is subject to further investigation.
NOTICE
Other indoor units in the circuit will show U9 Error. This means "There is an error in
the circuit but it is not the unit that shows U9".
2 At the located branch selector box, turn power supply OFF and then ON.
Check if error disappears.
Possible cause: External noise. Check further on how to eliminate external
factors.
3 Perform a check of the expansion valves in the branch selector box. See
"3.7 Expansion valve" [
Possible cause: Faulty expansion valve, loose connector, faulty expansion
valve coil.
4 Perform a check of the branch selector box PCB. See
4
box PCB" [ 214].
Possible cause: Faulty branch selector box PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
After power is supplied,
continuity has not been
detected on the coil for
expansion valve
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
Effect
Unit will stop running.
4
244].
Effect
Unit will stop running.
Reset
Power reset at branch
selector box.
"3.2.1 Branch selector
Reset
Power reset at branch
selector box.
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05