14. Servicing Mode
14.1.1Pump down operation (SW1)
∙Operate the pump down process according to the following procedure. o Confirm the valve on the liquid side and gas side are open.
o Press PUMP DOWN button (SW1) on the Service PCB inside the outdoor unit for more than 5 seconds. Pump down (cooling) operation is performed for 15 minutes.
o Set the liquid side 3 way valve to close position and wait until the pressure gauge indicates 0.01MPa (1.45 PSI).
o Immediate set the gas side valve to close position and then press the PUMP DOWN button (SW1) to stop the
pump down operation.
NOTE: Pump down operation will stop automatically after 15 minutes if PUMP DOWN switch (SW1) is not pressed again. Pump down operation is not started within 3 minutes after compressor is stopped.
LED | 2 | 3 | 4 | 5 | Message |
|
|
|
|
|
|
|
|
|
|
| Pump down operation in progress |
|
|
|
|
|
|
Status |
|
|
|
| 3 minutes before operation end |
|
|
|
|
| |
|
|
|
| 2 minutes before operation end | |
|
|
|
|
| |
|
|
|
| 1 minute before operation end | |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
| Pump down operation end |
|
|
|
|
|
|
: Flashing
14.1.2Test Run Operation
∙Test operation can be carried out using OPERATION TEST button (SW2) on the Service PCB inside the outdoor unit.
∙For Cooling test, press the OPERATION TEST button (SW2) for 5 seconds or more but less than 10 seconds, LED1 and LED 2 will illuminate when shift into cooling test operation.
∙For Heating test, press the OPERATION TEST button (SW2) for more than 10 seconds, LED 1 and LED 3 will illuminate when shift into heating test operation.
∙Press the OPERATION TEST button (SW2) again to cancel test operation.
29
