Aqua Control SELECT Series 2 사용 설명서 - 페이지 15

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1. Set Up the Multimeter

a. Ohms

i. Know the range of Ohms available for your multimeter and whether your meter is auto-ranging.

ii. Set the multimeter to the lowest Ohm (resistance) setting. Resistance is designated by Ohms.

iii. Determine how your multimeter designates open line.

touching.

iv. Determine how your multimeter designates continuity.

either zero or very close to zero. If not zero, this may be resistance internal to the meter and should be subtracted from all

subsequent readings. If your meter has an "auto-zero" feature, use it to zero the meter.

b. Volts

i. Set the multimeter to the highest setting

ii. Select AC volts. This is usually designated by VAC.

c. Amps - Use only a clamp ammeter e.g. Amprobe.

2. Check Neutral to Ground Voltage

a. Set multimeter to AC voltage, highest rating.

b. Check the voltage between Neutral and Ground.

c. The voltage should be zero.

d. If the voltage is other than zero, the neutral line may be bad.

e. A bad neutral may lead to faulty GFCI tripping.

3. Check Input Voltages - readings should be within 10% of nominal voltage.

a. Single Phase

i. Each line to Neutral should be approximately ½ of the input voltage.

ii. Each line to one another should be the source voltage.

b. Three Phase

i. 208 volt, Y

1. Each line to Neutral should be 120 volts.

2. Each line to one another should be source voltage.

ii. volt, Delta

1. L1 and L3 to Neutral should be half source voltage.

2. L2 to Neutral should be substantially higher. This must be the wild leg connection.

iii.

volt / 480 volt grounded.

1. Each line to Neutral should be approximately 277 volts.

2. Each line to one another should be source voltage.

iv. 480 volt Delta

1. Each line to one another should be source voltage.

c. Analysis

i. If lines read good to Neutral but zero to one another, the same leg is used for both lines. Correct this at the source.

ii. If the lines read bad to one another or bad to Neutral, the power source or power cable must be corrected

iii. A three-phase 240 volt delta power source must have the wild leg connected to L2, the center input of the disconnect

switch.

4. Check Output Voltages

a. 2-Wire: T1 - T2

b. 1-Phase: Black - Yellow

c. 3-Phase: T1 – T2, T1 – T3, T2 – T3

d. Analysis

i. Each reading should give source voltage.

ii. If good, problem is not in control panel although overloads or GFCIs may be too sensitive and cause premature tripping.

iii. If zero voltage: backtrack through components, checking input vs. output voltages, to determine which one is tripped

or faulty.

iv. If low voltage: very unlikely, control panel wired incorrectly.

5. Check Amps – readings should be within 10% of nominal voltage.

a. Single phase – check yellow wire.

b. Three phase – check each hot wire; readings should be within 5% of one another.

6. If GFCI tripped, perform "GFCI Troubleshooting Procedures"

7. If overload tripped, perform "Overload Troubleshooting Procedures"

TROUBLESHOOTING

GENERAL TROUBLESHOOTING

Aqua Control, Inc. 60 Hz. Select Series 2 Instruction Manual

Observe the reading when both probes are held in the air, not

This is done by touching the two probes.

This should be