Service manual Mastercool 30
Version 1.0
1.11.2011
8
Kemppi Oy
o
Generation 2 pressure damper system has a normal rubber single output
water hose and it is connected to disk-like pressure damper. It is made of
copper and has a single chamber to reduce the pressure variations. This
type damping circuit is used since 4/2010.
3.5. Control card jumpers
Jumpers control several functions and their behavior can be changed if faced frequent problems.
Normally Hydrocool pump system may have two types of malfunctions: pressure is rising to abnormal
level or coolant level is too low.
In some cases high pressure is consequence of very long water cables or cold temperature. In these
cases jumpers X11 and X10 can be used to get more tolerance to keep cooler running.
While coolant level is too low the only possibility is to add more of it. Jumper X9 is only to check if the
cooler alert is because of low pressure.
See service instructions to get more information how to use jumpers to rectify problems.
X80
For test use only
*Open
– Keep always open
X9
Pump motor current over and under pressure alarm.
*Open
– Alarm is possible
Closed – Alarm disabled
X10
Pump motor current over pressure alarm.
*Open
– Alarm is possible
Closed – Alarm disabled
X11
Pump motor current over pressure alarm level.
*Open
– Alarm level is normal
Closed – Alarm level is raised
3.6. Control card LEDs
H1 = Over temperature
H2 = Over and under pressure alert. This LED goes on also if temperature alert is given
