Power Supply Voltage Abnormality - Daikin SkyAir RZR-TA Series Service Manual

Troubleshooting by Error Codes

4.14 Power Supply Voltage Abnormality

A8
Error Code
Applicable FBQ-P
Models
Method of Error Error is detected by checking the input voltage of the fan motor.
Detection
Error Decision
When the input voltage of fan motor is 150 V or less, or 386 V or more.
Conditions
Supposed
 Defective power supply voltage
Causes  Defective connection on signal line
 Defective wiring
 Instantaneous power failure, others
Troubleshooting
232
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the condition of the power supply.
(1) Check if power supply voltage is 208-230 V ± 10%.
(2) Check if there is power open phase or defective wiring.
(3) Check if power supply voltage side unbalance is within 6 V.
There are
problems on the
condition of power supply
described
above.
NO
A8
Reoccurrence of
error.
NO
YES
YES
SiUS281811EA
Correct any fault.
Check and correct each wiring.
It is possible to have external
factor, such as brownout and
instantaneous power failure.
Part 6 Service Diagnosis