12-29
CONTROL SYSTEM
SM CKDDCI 2-A.3 GB
12.7.4.2 TPT
Sub-Menu
12.7.4.3 Pump Down Test procedure
Pump Down is used to evacuate the refrigerant back to the ODU in case of need to dis-connect the
indoor unit or the inter-connecting piping for repair.
Start the operation by navigating the HMI.
1.
A/C will start operate.
2.
After about 1 minute (finish of pre-test), the display will show:
3.
At this stage - close the Liquid valve.
After about 1 minutes, as soon as the low pressure will drop to below 1.5 bar(g), the
4.
LPS - Low pressure status will blink:
Close the suction valve
5.
Shut the unit power OFF
6.
The test will end after about 2 minutes. This is for percussion reasons in case the unit will not
7.
be shut OFF (or not closes the valves).
