Pump 1 flow running
Pump 2 flow running
Flow switch did not switch
through during the pump
operating phase
Check flow, check shut-
off valves, check the
setting of the reed
contact at the flow
monitor
DI mpcb compressor 1
DI mpcb compressor 2
DI mpcb compressor 3
DI mpcb compressor 4
Motor protection switch has
tripped
Motor current above the
allowable range,
Motor is running in two
phases only, rotational
direction,
poor contact at terminal
connections,
interturn short-circuit,
earth fault, rotor blocked.
Check the motor power
consumption, check
the operating point,
check the electrical
connection of the
components
High-pressure limiter has
tripped.
Unable to remove the
waste heat of the
refrigeration circuit.
Clean the condenser
and filter. Check the
function of the fan.
Check the cooling
water circuit. Install the
cover panels. Press the
Reset button and
acknowledge at the
display.
DI mpcb fan 1
DI mpcb fan 2
DI mpcb freecool.fan
Motor protection switch has
tripped
Motor current above the
allowable range,
Motor is running in two
phases only, rotational
direction,
poor contact at terminal
connections,
interturn short-circuit,
earth fault, rotor blocked.
Check the motor power
consumption,
Check the operating
point, check the
electrical connection of
the components
DI fan 1 error
DI fan 2 error
DI fan error freecooler
Internal monitoring of the
fan has tripped.
Motor is running in two
phases only, rotational
direction,
poor contact at terminal
connections,
interturn short-circuit,
earth fault, rotor blocked.
Check the motor power
consumption, check
the electrical
connection of the
components, check for
mechanical blocking,
Circuit breaker has tripped.
Current above the
allowable range,
poor contact at terminal
connections due to dirt or
corrosion,
short-circuit between the
heating elements, earth
fault.
Check the electrical
connection to the
components, test for
short to earth
Safety temperature limiter
of the tank heating has
tripped
Tank temperature too
high,
no water in the tank,
tripping point of the safety
temperature limiter (STP)
set incorrectly.
Check the tank
temperature, check the
level, check the
tripping point of the
STP