Discharge Pipe Control; Input Current Control - Daikin CTXS09GVJU Service Manual

Control Specification
3.4

Discharge Pipe Control

Outline
The discharge pipe temperature is used as the compressor's internal temperature. If the discharge
pipe temperature rises above a certain level, the operating frequency upper limit is set to keep this
temperature from going up further.
Detail Divide the Zone
Management within the Zone
3.5

Input Current Control

Outline
Detect an input current by the CT while the compressor is running, and set the frequency upper
limit according to this current.
In case of heat pump model, this control is the upper limit control function of the frequency which
takes priority of the lower limit of four-way valve activating compensation.
Detail
The frequency control will be made within the following zones.
When a stop current continues for 2.5 seconds after rushing on the stop zone, the compressor
operation stops.
If a dropping current is continues for 1.0 second after rushing on the dropping zone, the
frequency will be 2 Hz dropping .
Repeating the above dropping continues until the current rushes on the dropping zone without change.
In the unchanged zone, the frequency limit will remain.
In the return / reset zone, the frequency limit will be cancelled.
Limitation of current dropping and stop value according to the outdoor air temperature
1. In case the operation mode is cooling:
2. In case the operation mode is heating (only for heat pump model):
44
A°F
B°F
Zone
Stop zone When the temperature reaches the stop zone, stop the compressor and
Dropping zone Start the timer, and the frequency will be
Keep zone Keep the frequency upper limit.
Return / Reset zone Cancel the frequency upper limit.
dropping zone
dropping
The current drops when outdoor air temperature becomes higher than a certain level (model by model).
The current drops when outdoor air temperature becomes higher than a certain level (model by model).
Dropping zone
C°F
Keep zone
D°F
Control contents
correct abnormality.
dropping
SiUS12-814
A 248
B 231.8
C 228.2
D 224.6
(R4576)
dropping
.
Dropping zone
Keep zone
(R4577)
Function and Control