1LEV

Note 1 :

Symptoms of incorrect connection to BC controller LEV board

LEV No.

1

3

Cooling-only

Cooling-main

Heating-only

Heating-main

 

 

 

 

 

 

 

1)

1

3

Normal

 

 

 

 

 

 

 

2)

3

1

Insufficient cooling

Insufficient cooling, insuf-

Heating indoor SC small

Insufficient cooling

 

 

 

SH12 small,

ficient heating

PHM large

Heating indoor SC small

 

 

 

SC11 small

SH12 small, SC11 small

 

PHM large

 

 

 

SC16 small

SC16 large,

 

 

 

 

 

Branch piping SC small

Branch piping SC small

 

 

 

 

 

 

PHM large

 

 

 

 

 

 

 

 

 

Improper installation is the same for 1 and 2, so it is omitted here.

Note 2 : Method for checking LEV full open, full closed condition

1Check LEV full opening (pulse) using the LED monitor display (outdoor controller board SW1).

Full opened: 2000 pulses

Full closed: 60 pulses (LEV 1 may be greater than 60 during full heating operation.)

2With LEV full opened, check for pressure differential by measuring temperature of piping on both sides.

3With LEV full closed, check for refrigerant noise.

Note 3 : Use the following table to determine opening due to LEV differential pressure control and superheat control.

BC controller LEV basic operation characteristics

 

Region

Failure mode

Operating mode

Description

Normal range

 

LEV1

Small

Heating-only

High pressure (PS1) - medium pressure (PS3) is large.

2.0 ~ 3.5 kg/cm2G

 

pulse

 

Heating-main

 

(0.20~0.34MPa)

 

Large

High pressure (PS1) - medium pressure (PS3) is small.

 

 

 

 

Cooling-main

 

 

 

 

 

 

Cooling-only

SH12 is large.

SH12<25

 

 

 

Small

Cooling-main

 

 

FA

 

 

Heating-only

High pressure (PS1) - mid pressure (PS3) is small.

2.0 ~ 3.5 kg/cm2G

 

 

 

 

LEV3

 

Heating-main

 

(0.20~0.34MPa)

 

 

 

 

 

 

pulse

 

Cooling-only

 

SC16>6

 

 

 

 

SC16 and SH12 are small.

 

 

 

Large

Cooling-main

SH12>5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating-only

High pressure (PS1) - mid pressure (PS3) is large.

2.0 ~ 3.5 kg/cm2G

 

 

 

 

Heating-main

 

(0.20~0.34MPa)

 

 

 

 

 

 

 

 

 

 

 

Cooling-only

 

 

 

 

 

Small

Cooling-main

SH22 is large.

SH22<25

FB

LEV3a

 

 

Heating-main

 

 

pulse

 

Cooling-only

 

 

 

 

 

 

 

*

 

 

Cooling-main

SH22 is small.

SH12>5

 

 

 

 

Heating-main

 

 

 

 

 

 

 

 

 

* LEV3a operates when indoor unit connected to FB type is cooling mode.

–95–

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Mitsubishi Electronics PURY-P400, P500YMF-C specifications Lev

PURY-P400, P500YMF-C specifications

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