7-2-2. Current Control

The operating current may rise as a result of causes including increasing heating or cooling loads or decreases in power voltage. In these cases, the operating frequency is automatically reduced, or operation is stopped, in order to control the operating current so that it is (20 A) or less.

As a result:

•Power breakers and fuses will not be tripped.

•Operation can continue during this period with somewhat reduced heating or cooling capacity.

•Operation at normal capacity is restored when the cause of the current rise is eliminated.

Description of function

 

Example of operation for heating

Current

(20A)

 

Power Point C

(16.6A)

 

Point A

 

(17A)

 

Point B

 

Target

 

 

frequency

 

 

Frequency

 

Frequency

Stops operation

 

 

 

Approx.3 minutes

•Operates at the target frequency at Point A and below.

•Stops increases to the frequency between Points A and B.

•Reduces the frequency by 1 Hz per 0.5 seconds when Point B is exceeded.

•Stops operation, and restarts it appoximately 3 minutes later, if Point C is exceeded. (May operate when sudden voltage fluctuations occur. Indicates trouble.)

(1)Automatic frequency control

The operating frequency is reduced automatically, or operation is stopped, in order to control the operating current so that it is at or below the values shown in the table below.

 

HEAT

(20A)

 

COOL

Point C (peak cut trip)

(20.0)

(20.0)

Point B (Hz reduction)

(17.0)

(17.0)

Point A (Hz increase prohibit)

(16.6)

(16.6)

NOTE During defrost operation, the COOL current setting value is used.

(2) Current control

The operating frequency upper limits shown in the figure below are established for frequency reduction and increase-prohibit.

Current(A)

Example of operation during cooling

Trip

 

 

 

 

 

Hz reduction

 

 

 

Hz reduction

 

 

 

 

 

 

 

 

 

 

 

Hz increase prohibit

Hz increase

 

 

 

 

 

prohibit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(16)

 

 

 

 

 

 

Hz reduction

 

 

 

 

 

 

Hz increase prohibit

(15.6)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Frequency (Hz)

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(30)

 

 

 

 

 

 

 

 

 

 

69

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Sanyo SAP-CMRV1926EH service manual Current Control, Description of function, Automatic frequency control, Current control
Page 68 Page 70

SAP-CMRV1926EH, SAP-CMRV1426EH-F specifications

The Sanyo SAP-CMRV1926EH and SAP-CMRV1426EH-F stand out in the realm of advanced climate control solutions. As part of Sanyo's renowned lineup of air conditioning systems, these models are designed to offer superior performance, energy efficiency, and enhanced comfort, catering to both residential and commercial use.

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