I use PCZ1000A to an AC power supply (output: 100 Vac). While I am setting the CP mode to 1000 W and when the load current reaches 2.2 A, both the C.C and C.R LED blink and the load current can’t go up anymore. What should I do?

This blinking LED indicates that the other operation mode is activated.
In this case, the CC mode might be set to 2.2 A.
Therefore, the load current is limited to 2.2 A.
Set the CC mode to a larger value.