2] Controlling the Outdoor Unit
1. Flowchart of initial operation
(1) (E)P200, (E)P250, (E)P300, P350, P400, P450 models
50 F 60Hz or F < 50Hz
Initial startup mode starts.
Completed in the integrated operation time of 35 minutes.
Initial startup mode complete
Completed in the integrated operation time of 90 minutes.
(2) P500, P550, P600, P650, P700, P750, P800, P850, P900 EP400, EP450, EP500, EP550, EP600 models
*1 Qj:Total capacity (model name) code
Refer to VII [1] 2.(1) Dipswitches for the capacity codes (page 89).
Yes
No
50 F 60Hz (both OC and OS) or F < 50Hz (both OC and OS)
Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OC remains in operation, and the compressor on the OS starts up.
50 F 60Hz (OC) or F < 50Hz (OC)
Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OC starts up.
Both the OC and OS stop.
The startup sequence of the OC and OS is rotated.
50 F 60Hz (OS) or F < 50Hz (OS)
Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OS starts up.
*2
*3
*2The air conditioning load is too small for both the OC and the OS to simultaneously stay in operation.
*3The air conditioning load is high enough for both OC and OS to simultaneously stay in operation.
Initial startup mode complete The compressor on the OC starts up.
The total operating load of the indoor unit after 5 minutes of operation is P250 or above.
(*1 Qj 50) Initial startup mode starts.
F 60Hz
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(3) P950, P1000, P1050, P1100, P1150, P1200, P1250, EP650, EP700, EP750, EP800, EP850, EP900 models
*1 Qj:Total capacity (model name) code
Refer to VII [1] 2.(1) Dipswitches for the capacity codes (page 89).
Initial startup mode starts.
The compressor on the OC starts up.
F 60Hz
The total operating load of the indoor unit after 5 minutes of operation is P250 or above.
( *1 Qj 50)
The total operating load of the indoor unit after 5 minutes of operation is between P250 and P1000.
(50 < *1 Qj< 200)
50 F 60Hz (OC, OS1, and OS2) or F < 50Hz (OC, OS1, and OS2) Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OS remains in operation, and the compressors on the OS1 and OS2 start up.
50 F 60Hz (both OC and OS1) or F < 50Hz (both OC and OS1) Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OC remains in operation, and the compressor on the OS1 starts up.
50 F 60Hz (OC) or F < 50Hz (OC)
Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OC starts up.
The OC, OS1, and OS2 stop.
The startup sequence of the OC, OS1, and OS2 is rotated.
(The startup sequence of the OC, OS1 and OS2 is changed.) The OC, OS1, and OS2 stop.
The startup sequence of the OC, OS1, and OS2 is rotated.
(The startup sequence of the OC, OS1 and OS2 is changed.)
The OC, OS1, and OS2 stop.
The startup sequence of the OC, OS1, and OS2 is rotated.
(The startup sequence of the OC, OS1 and OS2 is changed.) 50 F 60Hz (OS1) or F < 50Hz (OS1)
Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OS1 starts up.
50 F 60Hz (OS2) or F < 50Hz (OS2)
Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OS2 starts up.
*2 *3
*4
*5 Yes
No
No
Yes
Initial startup mode complete
50 F 60Hz (both OS1 and OS2) Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OS1 remains in operation, and the compressor on the OS2 starts up.
or F < 50Hz (both OS1 and OS2)
*2The air conditioning load is too small for the OC, OS1, and OS2 to simultaneously stay in operation.
*3The air conditioning load is too small for both OC and OS1, or OS1 and OS2 to simultaneously stay in operation.
*4The air conditioning load is high enough for OC, OS1 and OS2 to simultaneously stay in operation.
*5The air conditioning load is high enough for both OC and OS1, or OS1 and OS2 to simultaneously stay in operation.
Emergency Operation Mode
-13- Emergency Operation Mode 1. Problems with the outdoor unit
Emergency operation mode is a temporary operation mode in which the outdoor unit that is not in trouble operates when one of the outdoor units in the P500 through P900/EP400 through EP600 models is in trouble or when one or two of the outdoor units in the P950 through P1250/EP650 througt EP900 models are in trouble.
This mode can be started by performing an error reset via the remote controller.
(1) Starting the emergency operation
1) When an error occurs, the error source and the error code will be displayed on the display on the remote controller.
2) The error is reset using the remote controller.
3) If an error code appears that permits an emergency operation in step 1) above, (See the table below.), the retry operation starts.
4) If the same error is detected during the retry operation (step 3 above), an emergency operation can be started by resetting the error via the remote controller.
Error codes that permit an emergency operation (Applicable to both OC and OS)
Emergency operation pattern (2 outdoor units)
Emergency operation pattern (3 outdoor units)
Trouble source Error codes that permit an
emergency operation Error code description
Serial communication error Bus voltage drop
Heatsink overheat protection Overload protection Overcurrent relay trip
Heatsink temperature sensor failure (THHS) Current sensor/circuit failure
Subcool heat exchanger bypass outlet temperature sensor failure Pipe temperature sensor failure
Discharge temperature sensor failure Accumulator inlet temperature sensor failure Subcool heat exchanger liquid outlet sensor failure Outside air temperature sensor failure
Open phase
Power supply sync signal abnormality 0403
4220, 4225 4230 4240 4250, 4255 5110 5301 5102 5103 5104 5105 5106 5107 4102 4115 Compressor
Fan motor Inverter
Thermistor
Power
TH2 TH3 TH4 TH5 TH6 TH7
OC
OC failure pattern Trouble Normal
Permitted Permitted Permitted Permitted
60%
Cooling Heating
Normal Trouble OS failure pattern OSEmergency
operation
Maximum total capacity of indoor units (Note 1)
OC
OC failure pattern
Trouble Trouble Trouble
Normal
Normal Normal Normal
Normal Normal
60% 40%
Cooling Heating
Normal Normal Normal
Trouble
Trouble Trouble Trouble
Trouble Trouble
OS1 failure
pattern OS2 failure
pattern OC, OS1 failure
pattern OC, OS2 failure
pattern OS1, OS2 failure pattern OS1
OS2 Emergency operation
Maximum total capacity of indoor units (Note 1)
(Note 1) If an attempt is made to put into operation a group of indoor units whose total capacity exceeds the maximum allowable capacity, some of the indoor units will go into the same condition as Thermo-OFF.
Permitted Permitted
Permitted Permitted
Permitted Permitted
Permitted Permitted
Permitted Permitted
Permitted Permitted
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(2) Ending the emergency operation 1) End conditions
When one of the following conditions is met, emergency operation stops, and the unit makes an error stop.
When the integrated operation time of compressor in cooling mode has reached four hours.
When the integrated operation time of compressor in heating mode has reached two hours.
When an error is detected that does not permit the unit to perform an emergency operation.
2) Control at or after the completion of emergency operation
At or after the completion of emergency operation, the compressor stops, and the error code reappears on the remote con- troller.
If another error reset is performed at the completion of an emergency mode, the unit repeats the procedures in section (1) above.
To stop the emergency mode and perform a current-carrying operation after correcting the error, perform a power reset.