Service manual Mastercool 30
Version 1.0
1.11.2011
12
Kemppi Oy
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If problems continue close X10 to disable over pressure alarm
If these do not help, the problem is not the over pressure, see the next section (Under pressure or no
water circulation).
Under pressure or no water circulation:
If coolant level is fine and jumpers X11 and X10 do not solve the cooler error, jumper X9 can be used to
check if the cooler alert given is because of the air bubble in the pump or leakage of pressure valves or
membrane. Before closing the X9 check that jumpers X11 and X10 are closed.
Note! Jumper X9 should be kept open and closed only for test purposes, because lack of the disturbed
water circulation alert may affect the TIG torch to burn.
Checking the water circulation:
•
Disconnect the blue snap connector and use screwdriver to unlock it (by pressing inside
the connector).
•
Try to run some water to container; if water flows circulation is ok.
•
Check that pump can raise the pressure while water hoses are connected (See the next
section “Normal operational pressure”).
4.3.2. Operational tests
During the maintenance it is always good idea to check some basic operations of the cooler. To be sure
control electronics and pump itself works as designed, there is basically four tests to execute. Pressure
meter is a nice tool to make reliable operational tests (suppressed meter is better because of the variable
pressure). Best place for pressure meter is just after the output snap connector behind the cooler (blue
mark).
Note! Remember to close the water circulation with hose loop or TIG torch, otherwise the pressure will
rise to the maximum and snap connector might start to leak.
4.3.2.1. Under pressure alarm
When water tank is empty or pressure is under 1 bar, control electronics activate the alarm
•
It can be seen by led H2 illuminating
•
If under pressure lasts over 7 seconds, cooler gives error message (X3-1 goes to 0)
Pressure meter connection to the
output snap connector, marked as blue
