Panasonic 3WAY VRF SYSTEM U-72MF1U9

Before attempting to start the air conditioner, check the following.

(1) All loose matter is removed from the cabinet, especially steel fi lings, bits of wire, and clips.

(2) The control wiring is correctly connected and all electrical connections are tight.

(3) The protective spacers for the compressor used for transportation have been removed. If not, remove them now.

(4) The transportation pads for the indoor fan have been removed. If not, remove them now.

(5) The power has been connected to the unit for at least 5 hours before starting the compressor. The bottom of the compressor should be warm to the touch and the crankcase heater around the feet of the compressor should be hot to the touch.

(6) Both the gas and liquid tube service valves are open. If not, open them now.

(7) Request that the customer be present for the trial run. Explain the contents of the instruction manual, then have the customer actually operate the system.

1. Turn the remote power switch on at least 5 hours before the test, in order to energize the crankcase heater.

2. After performing the leak inspection, applying vacuum, and performing refrigerant charge for the tubing which is connected on site, fully open the outdoor unit service valve. However if only one outdoor unit is installed, a balance tube is not used. Therefore, leave the valve fully closed.

3. When replacing the control PCB, be sure that the settings on the new PCB match those on the old PCB.

4. Use caution when making the settings. If there are duplicated system addresses, or if the settings for the Nos. of the indoor units are not consistent, an alarm will occur and the system will not start.

5. These settings are not made on the indoor unit PCB.;