Panasonic CS-F24DTE5 Service Manual page 54

CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5
10.5.10. Connecting power supply cables
CAUTION
• • • • For three phase model, never operate the unit by pressing the electromagnetic switch.
• • • • Never correct the phase by switching over any of the wires inside the unit.
10.5.11. Precautions with regard to test operation
CAUTION
• • • • Always be sure to use a properly-insulated tool to operate the switch on the circuit board. (Do not
use your finger or a metallic object.)
• • • • Never turn on the power supply until all installation work has been completed.
• • • • Turn on the circuit breaker 12 hours or more before a test run. (By supplying power to crankcase
heater, compressor is warmed and liquid compressing is prevented.)
• • • • Check that the voltage is 90% of rated voltage or higher when starting the unit.
(The unit will not operate if the voltage is less than 90% of rated voltage.)
• • • • Test operation can be carried out using the remote control unit or by using the switch on the
printed circuit board inside the outdoor unit.
If carrying out test operation at the printed circuit board of the outdoor unit, follow the procedure
given below. (If using the remote control unit to carry out test operation, refer to the installation
manual which is supplied with the indoor unit.)
• • • • Press the COOL or HEAT switch for 1 second or more.
(Be sure to select cooling mode first, and run the units in this mode for 5 minutes or more.)
• • • • Press the TEST button once more to cancel test operation mode.
• • • • When performing heating test operation when the outside temperature is high, or cooling test
operation when the outside temperature is low, the protection circuits may sometimes operate
within a few minutes.
NOTE 1 These units are equipped with connection error prevention circuits. If the units do not operate, it is possible that the connection
error prevention circuits have been operated. In such cases, check that the Indoor/outdoor unit connection wire (connected to
terminals
should then commence.
NOTE 2 Do not short the remote control unit wires to each other. (The protection circuit will be activated and the units will not operate.)
Once the cause of the short is eliminated, normal operation will then be possible.
NOTE 3 When running the units in heating mode during test operation, be sure to run the units in cooling mode first before selecting
this mode. If heating mode is selected first, it may cause problems with operation of the compressor.
NOTE 4 Test operation should be carried out for a minimum of 5 minutes. (Test operation will be cancelled automatically after 30
minutes.)
NOTE 5 Test operation mode should always be cancelled once test operation itself has been completed.
, and ) is connected correctly. If they are connected incorrectly, connect them correctly. Normal operation
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