GMC Mold Temperature Controller  
Issues > Check/Troubleshooting
LEVEL DROP appears on display .
  1. Medium equipment is not being supplied with water.
  2. Water supply solenoid valve is not functioning normally. (GMC-L, H)
  3. Solenoid valve for air release is not functioning normally. (GMC-L, H)
  4. Floatless/Float Switch will not detect.

1. Medium equipment is not being supplied with water.
(GMC-L, H types)
  1. Check water supplying equipment (primary side cooling water).
    • Water Supply valve
    • Drain valves
    • Cooling Tower pumps, etc.

    [Point]
    • Fully open valves.
    • Check to see if feeding pressure and drain-side pressure of cooling water at primary side are set as specified.
    (References)
    • Supply side pressure should be within the range of 0.1 Mpa (14.5 psi) and 0.3 Mpa (43.5 psi).
    • Drain-side pressure should be below 0.09 Mpa (13.0 psi).
    • Supplying water pressure should be 0.05 Mpa (7.25 psi) to 0.3 Mpa (43.5 psi) higher than the drain-side pressure.
    • But if the supplying pressure exceeds 0.3 Mpa, install a pressure-reducing valve.

(GMC-A type)
  1. Supply medium equipment with oil.
    [Point]
    Use oil provided by Matsui to supply equipment.
If problem persists
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2. Water supply solenoid valve is not functioning normally. (GMC-L, H)
  1. Take valve apart and see if it functions properly.
Solenoid Valve Cleaning
Solenoid Valve Order

If problem persists
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3. Solenoid valve for air release is not functioning normally. (GMC-L, H)
  1. Take valve apart and see if it functions properly.
Solenoid Valve Cleaning
Solenoid Valve Order
If problem persists
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4. Floatless/Float Switch will not detect.
  1. Switch may not detect medium when scale does not function properly. Clean floatless (L, H types)/float (A types) switches if either are found to be dirty upon inspection.

Floatless Switch Cleaning
Float Switch Cleaning
Maintenance/Inspection
Floatless Switch Order
Float Switch Order

If problem persists
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