●Functions
75
6
Functions
Functions
Functions
２
Function Description
1 Stop
Stop due to alarm
When a malfunction occurs while in running, used to stop compressor or else for protection.
Stop due to alarm is classified into the following two levels.
・Alarm level 1: All the compressor, pump, and fan stop operation.
・Alarm level 2:
Only the compressor stops running. (The pump and fan keep operating.)
Stop due to
temperature warning
When the monitoring temperature exceeds the set temperature while in
operation, used to stop the compressor or else.
・Operation in stop: Only the compressor stops operation. (The pump and
fan keep operating.)
・
Resetting procedure (Two procedures are available according to setting.)
Automatic resetting - After a lapse of “standby for restart”, the system
will automatically restart operation.
Manual resetting - After resetting the power supply on manual control,
turning ON the circuit breaker again will restart operation.
* For details of temperature warning setting procedure, refer to information
on page 69 and later.
2 Standby Standby for restart
In order to prevent frequent ON/OFF operations of the compressor and
equalize pressure within the refrigerant system, used to stand by for the restart
of the compressor for a period of 90 seconds after the compressor stops.
3
Startup
control
Startup control
In order to start the compressor, used to increase the operating frequency to 25Hz
once, and then, operate the compressor at the minimum operating frequency.
10Hz/s
ON/OFF thermostat
setting
ON/OFF settings of the thermostat under the following conditions against the
set temperature.
Thermostat ON condition: Detected temperature > Set (target) temperature
Thermostat OFF condition: Detected temperature ≦ Thermostat OFF temperature
4
Function
control
(High-
accuracy) oil
temperature
control
Compressor
control
In medium/high load regions, used to control the compressor operating
frequency, thus making the oil temperature matching with the target temperature.
Electronic
expansion
valve control
In low load regions, used to control opening of the EEV for main circuit and MOV
for hot gas, thus making the oil temperature matching with the target temperature.
Auto tuning control
Used to compute P/I gain for temperature control and then set it to parameter concerned.
Fan rpm control
In order to reduce running noise, rpm of the DC fan is decreased depending
on the capacity command value.
AKZ14A AKZ32A AKZ43A AKZ56A AKZ90A
max 1400 1350 1390 1100 1050
min 1400 1100 1100 850 850
*
Note that the fan is run at the minimum rpm when the room temperature is
30℃ or less, while it is run at the maximum rpm when it is 35℃ or more.
max
min
rpm
(rpm)
Capacity command value (%)
65 85 100
00_PB00540A_M10.indb 75 2023/08/09 12:59:04
To Next Page
Loading...
