what is the meaning of Error, exit code 73 and Error, exit code 9 for pool action like Deposit or Withdraw?

You need to deposit from the validator account:

throw_unless(73, (sender_wc == -1) & (sender_addr == validator_address));

https://github.com/ton-blockchain/nominator-pool/blob/main/func/pool.fc#L591

If I want to stop a pool,and take Validator`s ton back,what should I do?It seems that I can not do this when the pool is active.Howerver there is no command to passive a pool.