Cause: The error code is returned when the merchant does not have enough settlement funds for the refund.
Solution: Currently, merchants cannot add funds into their settlement accounts themselves. Try solve the problem according to the following instructions:
Wait for Alipay to send settlement funds. When the available settlement funds are enough, the refund is processed automatically.
For urgent refunds, contact Alipay Technical Support (firstname.lastname@example.org) for help.