Wiring Error Check; Power Save Mode; Mode Priority Function - Panasonic CU-2E18SBU-5 Service Manual

14.1.3

Wiring Error check


The unit capable to correct the wiring error automatically by following procedures.
Confirm the valve on the liquid side and gas side is open.
o
Press WIRING CHECK button (SW3) on the Service PCB inside the outdoor unit for more than 10 seconds
o
to start wiring check operation.
Wiring check process will complete in approximately 10 minutes. However, wiring check operation will not
o
start within 3 minutes after compressor is stopped. When outdoor air temperature is less than 41°F or unit
has abnormality, wiring check will not start. (See NOTE 2)

The LED 2 to LED 6 in Service PCB inside the outdoor unit indicate the possibility of the correction as shown in
the table below:
LED 2 3 4 5
Room A B - -
All flashing
LED2, 4, 6 and LED 3, 5
alternatively flashing
Flashing one after
another
Other than above

If automatic correct is impossible, check the
indoor unit wiring and piping manually.
NOTE:
1 For two rooms connection, LED 4 and 5 are not illuminated after wiring operation complete.
2 If the outdoor air temperature is less than 41°F or unit has abnormality, wiring operation will not start.
3 After wiring check operation is complete, LED indication will illuminated until normal operation starts.
4 Follow the product diagnosis procedure.
5 When LED 1 only illuminate, indicates that outdoor unit is operating normally.
14.1.4

Power Save Mode


Power Save Mode can be enabled by pushing POWER SAVE switch (SW4) to ON before power supply ON.

When Power Save Mode is ON, the unit can be operate at lower running current where the breaker capacity not
achieve the requirement.
14.1.5

Mode Priority Function


Mode priority function can be enabled by pushing MODE PRIORITY switch (SW5) to ON before power supply
ON.

When Mode Priority Function is ON, the mode priority is given to higher capacity indoor units.
14.1.6 Cooling Only Operation

Setting of Cooling only operation.
The equipment can be set to cooling only operation by setting the JP line on the outdoor unit display circuit board.
[Setting method]
Switch off power supply to the outdoor unit, cut JPN1 (COOL ONLY) as shown in Figure 1.
After cutting off the wire, switch ON the equipment power.
When setting the cooling only operation, Heating operation is disabled.
ODOUR WASH operation is disabled. (Odour cut operation is still enabled.)
To revert the setting back to heat pump operation, switch OFF the equipment power, reconnect JP1 (COOL ONLY)
back to short circuit condition and switch ON the equipment power.
6 Message
-
Automatic correction impossible
Wiring check in progress
Automatic correction completed
Unit has abnormality (NOTE 4)
Wiring automatic correct example
Terminal block
From Room B
to the "living
room"
LED lighting sequence after a wiring correction.
Order of LED flashing: 3--> 2
32
From Room A to the
"bedroom"
Wiring error check