Check Operation Not Executed - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

SiUS331604E

4.40 Check Operation Not Executed

U3
Error Code
Applicable
All outdoor units
Models
Method of Error Determined based on whether check operation is executed or not
Detection
Error Decision Error is decided when the unit starts operation without check operation.
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Check operation is not executed.
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Has the check
operation performed
on outdoor unit
PCB?
YES
NO
Troubleshooting by Error Code
Press BS4 on master outdoor unit
PCB for 5 seconds or longer to
check operation.
Replace the outdoor main PCB (A1P).
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