Precautions - Panasonic U-26PE1U6 Technical Data & Service Manual

<Procedure of CZ-RTC4>
Operates the unit with the thermostat forced ON.
1 Press and hold the
longer.
2 " " appears on the remote controller LCD
display (Fig. 6-4).
3 Press the button to start the test run.
• The temperature cannot be adjusted in Test Run mode.
(This mode places a heavy load on the machines.
Therefore use it only when performing the test run.)
• The test run can be performed using the HEAT, COOL,
or FAN operation modes.
The outdoor units will not operate for
approximately 3 minutes after the power
is turned ON and after operation is stopped.
• If correct operation is not possible, an error code is
displayed on the remote controller LCD display.
4 Press the button to return to normal remote controller display.
• To prevent continuous test runs, this remote controller includes a timer function that cancels the test run after
60 minutes.
5 For the test run of an inverter outdoor unit, operate the compressors for a minimum of 10 minutes.
• The operation is possible even if the cassette-type ceiling panel has not been installed.
("P09" display does not occur.)

6-6. Precautions

Request that the customer be present when the test run is performed. At this time, explain the operation manual
and have the customer perform the actual steps.
Be sure to pass the manuals and warranty certificate to the customer.
Check that the AC 230 / 208 V power is not connected to the inter-unit control wiring connector terminal.
* If AC 230 / 208 V is accidentally applied, the indoor or outdoor unit control PCB fuse (0.5A for both indoor
and outdoor units) will blow in order to protect the PCB. Correct the wiring connections, then disconnect the
2P connectors (indoor: blue, OC) (outdoor: blue, OC) that are connected to the PCB, and replace them with
2P connectors (indoor: brown, EMG) (outdoor: brown, EMG). (Refer to the figure below.) If operation is still not
possible after changing the brown connectors, try cutting the varistor (VA002) (both indoor and outdoor).
(Be sure to turn the power OFF before performing this work.)
Indoorunit control PCB
IC8
button for 4 seconds or
VA002 (Varistor)
CN44 EMG
CN40 OC
Fuse
0.5A
A
1 4
Outdoorunit control PCB
3 – 5 HP
Fuse
0.5A
Fig. 6-5
6-5
6. Test run
2
°
°
3
CZ-RTC4
Fig. 6-4
Varistor (black)
VA002
Terminal plug (black)
EMG (brown) connector
OC (blue)
connector
6