Addison B Руководство по установке, эксплуатации и техническому обслуживанию - Страница 16
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TROUBLE SHOOTING GUIDES CONTINUED
Hot Gas Bypass Regulator
SYMPTOM
A. Erratic pressure control.
B. Regulator leakage.
C. Regulator hunting
(chattering) large fluctuations
in controlled pressures.
D. Regulator will not provide
pressure control.
E. Regulator fails to close.
POSSIBLE CAUSE
1. Defective regulator.
2. Dirt causing regulator to bind.
3. Power source to hot gas solenoid or
operation of the solenoid is intermittent.
1. Dirt in regulator causing seat to remain open.
2. Worn or eroded seating surface on regulator.
1. Regulator is oversized.
2. Regulator and liquid injection Thermo Valve
have control interaction.
3. Regulator and cylinder unloaders have
1. Regulator seat is restricted.
2. Pressure adjusting stem is set at a point so
high that suction pressure never reaches the set
point.
3. Strainer clogged at the regulator inlet.
4. MOPD exceeded across the solenoid or loss
of source voltage.
5. Solenoid coil burned out.
6. Wrong type distributor for hot gas bypass to
the evaporator.
1. Dirt under seat of the regulator.
2. Diaphragm failure (leakage around the
adjusting stem)
3. Pressure adjusting stem is set at a point so
high that suction never reaches the set point.
4. Blocked external equalizer passage.
5. Worn or eroded regulator seat.
1. Replace defective part.
2. Disassemble regulator and clean internal parts. Install strainer.
3. Determine if problem is caused by supply voltage, solenoid, or excessive
MOPD. Make changes necessary to correct problem.
1. Clean the regulator. Install strainer.
2. Replace defective part.
1. Contact Addison manufacturer for correctly sized regulator.
2. Increase superheat setting. Dampen bulb response by repositioning.
3. Differential should be increased between the controls by lowering the
regulator's set point.
1. Locate and remove stoppage. Install strainer.
2. Readjust the regulator.
3. Locate and remove stoppage.
4. Replace solenoid or troubleshoot the electrical problem.
5. Replace coil.
6. Install proper Venturi - Flo type distributor for low pressure drop.
1. Locate and remove stoppage. Install strainer or drier filter.
2. Replace defective parts.
3. Readjust the regulator.
4. Locate and remove stoppage. Install strainer.
5. Replace defective part.
REMEDY
15