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Defrost Operation

5ACV030CR

Defrost will start if the following conditions are met for 3 minutes:-

a. Continuous compressor operation in heating mode for at least thedefrosting interval duration (D4 setting factory default 45mins)b. Inv outdoor coil outlet temperature < 0C (D1 setting) orc. Entering water temperature > 18C

Defrost process

Defrost terminateWhen either of the below conditions is met, the defrost operation will beterminated:-

a. Inv outdoor coil outlet temperature > 14Cb. Defrost time exceed 10 mins.

ON

ON

Variable drivefre uenc

Variable

speedfan

4-way valve(Variabledrive

70Hz

End Resumeheating mode

30Hz 30Hz

Start

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5ACV055CR & 5ACV075CR

Defrost will start if the following conditions are met for 3 minutes:-a. Continuous compressor operation in heating mode for at least the

defrosting interval duration (D4 setting factory default 45mins)

b. Inv outdoor coil outlet temperature < 0C (D1 setting) orc. Entering water temperature > 18C

Defrost process

Defrost terminateWhen either of the below conditions is met, the defrost operation will beterminated:-

a. Inv outdoor coil outlet temperature > 14Cb. Defrost time exceed 10 mins.c. Entering water temperature < 10C

ON

ON

Variable drivefrequency

Variablespeedfan

4-way valve(Variabledrive

90Hz

End Resumeheating mode

30Hz 30Hz

Start

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Variable drivecom ressor

Starts defrosting

Variable

speedfan

ON

ON

ON

4-way valve(Variabledrive

2 seconds

10 seconds15 seconds30 seconds2 seconds

Targeted frequency 70Hz

2 seconds

Ends defrosting Starts heatingmode

High fan

Fixed drivecompressor

Starts defrosting

Fixedspeedfan

ON

ON

ON

4-wayvalve(Fixeddrive)

2 seconds

10 seconds15 seconds30 seconds2 seconds

2 seconds

Ends defrosting Starts heating

mode

High fan

5ACV100CR & 5ACV135CR

Defrost will start if the following conditions are met for 3 minutes:-a. Continuous compressor operation in heating mode for at least the

defrosting interval duration (D4 setting factory default 45mins)

b. Inv and fixed drive outdoor coil outlet temperature < -8C (D1 setting) orc. Entering water temperature > 23C ord. Differential of ambient and coil temperature > 4C

Defrost processInverter drive

Fixed drive

Defrost terminateWhen either of the below conditions is met, the defrost operation will beterminated:-

a. Inv or fixed drive outdoor coil outlet temperature > 14Cb. Defrost time exceed 10 mins.c. Entering water temperature < 12C

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ON

ON

Variable compfre uenc

System 1soutdoor fan

System 1s 4-way valve

90Hz

EndResumeheating mode

Start

System 1sfixed comp

ON

Fixed drivecom ressor

Start

Fixedspeedfan

ON

ON

ON

4-wayvalve(Fixeddrive)

60s

EndResumeheatin mode

60s

5ACV210CR

Defrost will start if the following conditions are met for 3 minutes:-a. Continuous compressor operation in heating mode for at least the

defrosting interval duration (D4 setting factory default 45mins)

b. Inv and fixed drive outdoor coil outlet temperature < -8C (D1 setting) orc. Entering water temperature > 18C

Defrost processSystem 1 (with Inverter Compressor)

System 2

Defrost terminateWhen either of the below conditions is met, the defrost operation will beterminated:-

a. Inv or fixed drive outdoor coil outlet temperature > 14Cb. Defrost time exceed 10 mins.c. Entering water temperature < 10C

30Hz 30Hz