Canatal M52 - High Pressure Alarm

M52 Microprocessor User's Guide
M52UMCT Oct-03 49
High Pressure Alarm
High pressure
alarm
Compressor high
pressure cutout
switch intervention
Wrong high pressure
cutout switch
calibration
Re-calibration
the high
pressure cutout
switch
Dirty condenser
Clean condenser
Too low airflow
Clear air intake
and discharge
obstructions
Too high
discharge
pressure ?
Condenser fans not
running
Check
condenser
control circuit
and indoor unit
interlock wirings
Air cooled
system ?
yes
No condensing water
Check hydraulic
circuit
Too high air
temperature
Check possible
air short
circuiting
no
yes
Dirty heat exchanger
Clean heat
exchanger
Too low water flow or
too high water
temperature
Check design
data and reset to
design condition
Water regulating valve
malfunction
Check water
regulating valve
operation
no