SiUS042113E
Control Specification
Part 4 Functions and Control
63
PI Control
1.
P control
The
D value is calculated in each sampling time (20 seconds), and the frequency is adjusted
according to its difference from the frequency previously calculated.
2.
I control
If the operating frequency does not change for more than a certain fixed time, the frequency is
adjusted according to the
D value.
When
D value is low, the frequency is lowered.
When
D value is high, the frequency is increased.
3.
Frequency control when other controls are functioning
When frequency is dropping:
Frequency control is carried out only when the frequency drops.
For limiting lower limit:
Frequency control is carried out only when the frequency rises.
4.
Upper and lower limit of frequency by PI control
The frequency upper and lower limits are set according to the command of the indoor unit.
When the indoor or outdoor unit quiet operation command comes from the indoor unit, the upper
limit frequency is lower than the usual setting.
3.3 Standby Electricity Saving (Suspend Function)
Outline
This function is to save standby electricity consumption while the air conditioner is not in operation
by partially separating the electrical circuit of indoor and outdoor units from the power source.
Details
Standby electricity saving function can be activated/deactivated from the service mode of the
remote controller. Refer to page 155 for details.
When standby electricity saving is ON, the system enters suspend state if both indoor and
outdoor units are not in operation.
The system will not go into suspend state when some voltage is applied to the outdoor unit for
protection purpose even if the indoor unit is not in operation.
In suspend state, power supply to the outdoor unit is halted and there is no communication
between the indoor unit and the outdoor unit.
Also the service monitor LED (LED A) lights off.
To return from the suspend state, start fan or other operation to turn on the indoor unit.
Summary of Contents for FTXM-V Series
Page 16: ...SiUS042113E 12 Part 2 Specifications 1 Specifications 13 Part 2 Specifications...
Page 96: ...Troubleshooting SiUS042113E 92 Part 6 Service Diagnosis Reference Check No 01 Refer to P 134...
Page 150: ...Check SiUS042113E 146 Part 6 Service Diagnosis 18 24 class R24539 DC DC W V U...
Page 166: ...Piping Diagrams SiUS042113E 162 Part 8 Appendix RXM24VVJU 3D132217...
Page 171: ...SiUS042113E Operation Limit Part 8 Appendix 167 3 Operation Limit RXM09 12 18 24VVJU 3D133582A...
