# Q: What does ITC-308 PT (compressor delay) mean?

**URL:** <https://community.inkbird.com/t/q-what-does-itc-308-pt-compressor-delay-mean/74>\
**Category:** Questions & Answers\
**Tags:** smart-controller\
**Created:** [October 13, 2021, 10:04am UTC](https://community.inkbird.com/t/q-what-does-itc-308-pt-compressor-delay-mean/74 "2021-10-13T10:04:25Z")\
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**Post date:** [October 13, 2021, 10:04am UTC](https://community.inkbird.com/t/q-what-does-itc-308-pt-compressor-delay-mean/74/1 "2021-10-13T10:04:25Z")

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A: When the time interval between two refrigeration operation is larger than preset delay, the equipment will start refrigeration immediately; when the time interval between two refrigeration is less than preset delay, the equipment won’t start refrigeration until preset delay is satisfied.

For example, set PT=3. (Compressor Delay 3 minutes)

For the first time, when temperature reached TS+CD, it will turn on the cooling outlet, turn off at TS. It takes 1 minute to reach TS+CD again. At this time, the cooling outlet will not turn on immediately, it will wait 2 minutes.