Table of Contents
Advertisement
Basic Control
2.4
Cooling Operation Fan Control
In cooling operation with low outdoor air temperature, this control is used to provide the
adequate amount of circulation air with liquid pressure secured by high pressure control using
outdoor unit fan.
Outline
In cooling operation fan control, outdoor unit fans are controlled by PI control to come the
cooling Tc to 34°C.
However in normal operation, the fan control restricts lower limit of the number of rotations
according to outdoor air temperature.
Lower Limit Restriction for Cooling Operation Fan Control
60
Lower limit
STEP7
Ta≤17ºC
Ta≥20ºC
Lower limit
STEP5
Ta≤15ºC
Ta≥18ºC
Lower limit
STEP1
Ta≤9ºC
Ta≥12ºC
No limitation
Ta: Outdoor air temperature
Fan Steps
Cooling
M1F
0 rpm
STEP0
250 rpm
STEP1
400 rpm
STEP2
STEP3
285 rpm
360 rpm
STEP4
445 rpm
STEP5
STEP6
580 rpm
715 rpm
STEP7
850 rpm
STEP8
Reference
Heating
M1F
STEP1
250 rpm
850 rpm
STEP8*
There are 2 steps in heating operation.
* Depends on models
SiEBE18-526
M2F
0 rpm
0 rpm
0 rpm
250 rpm
325 rpm
410 rpm
545 rpm
680 rpm
815 rpm
M2F
0 rpm
815 rpm
(Q0373)
Function
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
