Battery Switch Board (Battery Charger & Discharger)

1. Equipment Specification:

a. Battery Switch Board (Battery Charger & Battery Discharger) 
b. Brand : UZUSHIO Electric co.,ltd. 
c. Battery 

• Capacity : 200AH
• Voltage : 24VDC
• Current : 20A 

d. Charger

1. Source : 440V
2. Frequency : 60Hz.
3. Output : DC 22- 32V
4. Charge : 30A

Repair Battery Switch Board (Battery Charger & Discharger)

2. Problems occurred ( information from the owner / user ):

1. Indicator lights to the monitoring fuse does not work, the lights remain lit fuse in an is lost. 
2. VU ( Volume Unit) to monitor resistant grounding does not show an accurate value in monitor mode and test mode. 
3. Wires inside the panel so that it takes less tidy cable track

VU Unit

3. Inspection results

1. Indicator lights to the monitoring fuse does not work, the lights remain lit fuse in an is lost.

a. Trip Circuits cut off / burned
Specification of Trip Circuit:

· Type P450 15A (P4-15 250V/15A) No brands

b. Rectifier Protect Fuse is not standard / modifications have been done
Specification of Rectifier Protect Fuse:

· Fuse 30A

Battery Switch Board

2. VU ( Volume Unit) to monitor resistant grounding does not show an accurate value in monitor mode and test mode

Possibilities occur:

a. There is a problem in the Accessories Unit

Specification of Accessories Unit:

b. VU meter unit for grounding resistance meter problem

Specification of VU meter unit:

• Brand : Toyo Keiko

• Type : NN-220A

c. Timer problem

Specification of Timer unit:

• Brand : Omron

• Type : H3B4

d. Selector switch for Monitor and Test Position problem

e. Ground Connection Lost
3. Wires inside the panel so that it takes less tidy cable track

a. Too many spare cables are not neatly.

 Load Control unit Battery Switch Board

4. Problem solving

Indicator lights to the monitoring fuse does not work, the lights remain lit fuse in an is lost.

· Replacement of trip circuit

· Note: There should be more spare ‘trip circuit’ , since the trip circuit will be cut off in the event of mains fuse broke. The possibility of breaking up the frequent occurrence of very large.

· Replacement of mains fuse with a fuse that is safe / standarad
VU ( Volume Unit) to monitor resistant grounding does not show an accurate value in monitor mode and test mode.

· Check and repair if necessary on the unit accessories, VU meter, Timer, Selector Switch, and Grounding Connection.

· Note: Possible replacement could occur in the unit VU meter, Timer, Selector Switch.

1. Wires inside the panel so that it takes less tidy cable track

Installing Cable Duct/ Cable Tracking

Pressure Gauge data and benchmarking results with a Pressure Gauge Calibrator Master

1. Filter Regulator Pressure Gauge for Automatic Level Controller

a. Brand: SMC

b. Range: 0 – 4 kg/cm2 or 0 – 1.65 psi

c. the Diameter of the face: 1.65 "

d. Connector Diameter: 0.4 "

e. Type: rear Connector

f. Results of the Comparison with a master Pressure Gauge:

Filter Regulator Pressure Gauge for Automatic Level Controller

-Master: 3, 0kg/cm2

-Filter Regulator Pressure Gauge: 3, 05kg/cm2

-Condition: Linear

2. Automatic Level Controller for Pressure Gauge

1) Supply

a. Brand: NKS

b. Range: 0 – 3 kg/cm2

c. Face Diameter: 2 "

d. Connector Diameter: 0.5 "

e. Type: rear Connector

f. Results of the Comparison with a master Pressure Gauge:

Comparison with a master Pressure Gauge Supply

-Master: 3, 0kg/cm2

-Supply Pressure Gauge: 3, 2 kg/cm2

-Condition: Linear

2) Output Signal

a. Brand: NKS

b. Range: 0 – 2 kg/cm2

c. Face Diameter: 2 "

d. Connector Diameter: 0.5 "

e. Type: rear Connector

f. Results of the Comparison with a master Pressure Gauge:

Comparison with a master Pressure Gauge Output Signal

-Master: 2, 0kg/cm2

-Output Pressure Gauge: 2, 2kg/cm2

-Condition: Linier

3. Positioner/Level Control Valve for Aux Condenser

1) Supply Pressure Gauge

a. Brand: NKS

b. Range: 0 – 3 kg/cm2

c. the Diameter of the face: 1.65 "

d. Connector Diameter: 0.25 "

e. Type: bottom/side Connector

f. Results of the Comparison with a master Pressure Gauge:

Comparison with a master Pressure Gauge Supply Pressure Gauge

-Master: 2, 0kg/cm2

-Supply Pressure Gauge: 1, 9kg/cm2

-Condition: Error/fluctuations

2) Output Pressure Gauge

a. Brand: NKS

b. Range: 0 – 2 kg/cm2

c. the Diameter of the face: 1.65 "

d. Connector Diameter: 0.25 "

e. Type: bottom/side Connector

f. Results of the Comparison with a master Pressure Gauge:

Comparison with a master Pressure Gauge Output Pressure Gauge

-Master: 2, 0kg/cm2

-Output Pressure Gauge: 1, 9kg/cm2

-Condition: Error/fluctuations

3) Signal Input Pressure Gauge

a. Brand: NKS

b. Range: 0 – 2 kg/cm2

c. the Diameter of the face: 1.65 "

d. Connector Diameter: 0.25 "

e. Type: bottom/side Connector

f. Results of the Comparison with a master Pressure Gauge:

Comparison with a master Pressure Gauge Signal Input Pressure Gauge

Master: 2, 0 kg/cm2

-Signal Input Pressure Gauge: 2, 1 kg/cm2

-Condition: Error/fluctuations

Control valve repair process

1. Open the tubing connection 

• Filter Regulator air supply
• Valve positioner air supply

• Valve positioned outlet to valve diaphragm 
• Valve positioned inlet signal 

2. Open filter regulator and valve positioned

3. Open Linkage, actuator jointed and scale pointer

4. Open yoke from valve

5. Open the valve cover

6. Clean up valve plug

7. Closed again by taking into account the possible leakage