user manual

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14.1.3 Wiring Error check
 The unit capable to correct the wiring error automatically by following procedures.
o 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
to start wiring check operation.
o Wiring check process will complete in approximately 10 minutes. However, wiring check operation will not
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 6 Message
Room A B - - -
All flashing Automatic correction impossible
LED2, 4, 6 and LED 3, 5
alternatively flashing
Wiring check in progress
Flashing one after
another
Automatic correction completed
Status
Other than above Unit has abnormality (NOTE 4)
 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 function
 The unit capable to limit the operation mode to Cooling Mode only (Heating mode disabled) by cutting JP1
(COOL ONLY) before power supply ON.
 This function prevent wrong operation during the unit installed in server room.
 This function could be disabled again by short the JP1 (COOL ONLY) before power supply ON.