Carrier XCT7 Installations- Und Benutzerhandbuch Seite 33

Trial operation and performance
Trial operation
• Before trial operation:
Before charging, measure the resistor between the power terminal block (live wire and neutral wire) and the earthed point
with a multimeter, and check if it is over 1MΩ. If not, the unit cannot operate.
To protect compressor, charge the outdoor unit for at least 12 hours before powering on. If the crankcase heater is not
charged for 6 hours, the compressor will not work.
Confirm that the bottom of the compressor gets heated.
Except when there is only one master unit connected (no slave unit), under all other conditions, open fully the outdoor
operating valves (gas and liquid sides). If operating the unit without opening the valves, the compressor will fail.
Confirm all indoor units are charged. If not, there will be water leakage.
Measure the system pressure with pressure gauge, at the same time, operate the unit.
• Trial operation
For the trial operation, refer to the information provided in the performance section.
26