2.31 U0: Force cooling operation not performed
Digital display output
Description
 Forced cooling operation is set by switch S10 but it not performed in 30 minutes after power-on.
 All units stop running.
 Error code is only displayed on the master unit.
Trigger / recover condition
 Trigger condition:
Force cooling operation not performed in 30 minutes after power-on.
 Reset method: Manually restart.
Possible causes
 n11 was not selected for force cooling operation within 30 minutes after power on.
Procedure
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