Page 32mrcool.com
Post Installation Checks
Test Run Instructions
Preparation before connecting the power:
1. Power must not be connected if the installation work is not completed.
2. Control circuit is correct and all the wires are firmly connected.
3. Cut-off valves of the gas pipe and liquid pipe are open.
4. The inside of the unit should be clean. Take irrelevant objects out if there is any.
5. After checking, re-install the front side plate.
Operation after connecting the power:
1. If all the above works are finished, power on the unit.
2. If the outside temperature is more than 30°C, heating mode can’t be enabled.
3. Make sure the units can run normally.
4. If there are any loud and/or abnormal sounds contact MRCOOL Tech Support immediately.
NOTICE:
1. If you use remote control to turn off the unit and then immediately turn the unit on again, compressor will
need 3min to restart. Even if you press “ON/OFF” button on the remote control, it won’t be started up right
away.
2. If there’s no display on the wired control Change to: temperature controller, it’s probably because the
connection wire between the units and wired control Change to: temperature controller is not connected.
Please check again.
DOUBLE-CHECK PIPE CONNECTIONS
During operation, the pressure of the refrigerant circuit will increase. This may reveal leaks that were not present
during your initial leak check. Take time during the Test Run to double-check that all refrigerant pipe connection
points do not have leaks.
Test Run
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