OPTIMA / MAYA SERIES · HEAT PUMP AIR/WATER
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Pag: 28
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6.5.4
WATER FLOW PROTECTION (F46=0, disable)
After 30 seconds with the water pump ON, the flow switch status is checked; If after another 5
seconds the status of the flow switch is OFF, the machine is stopped and display the error code
“A15”.
6.5.5
HIGH PRESSURE PROTECTION
It is a normally closed switch in the controller. The controller checks during 5 seconds the status
of the high pressure switch and it will take another 5 seconds to act. If it is open, the machine
will stop. If at any time, the status of the high pressure switch is closed, the machine will run
automatically. But if within an hour we have 3 alarms of this protection, the system will be
blocked in alarm status and display error code “A12” or “A14”. In order to unblock the system,
manual reboot is needed.
6.5.6
LOW PRESSURE PROTECTION
It is a normally closed switch in the controller. During the defrosting and in the first three
minutes after switching on the machine, the status of the low pressure switch is not checked. In
o not check the low pressure signal;
The controller checks during 5 seconds the status of the low pressure switch and it will take
another 5 seconds to act. If it is open, the machine will stop. If at any time, the status of the low
pressure switch is closed, the machine will run automatically. But if within an hour we have 3
alarms of this protection, the system will be blocked in alarm status and display error code “A11”
or “A13”. In order to unblock the system, manual reboot is needed.
6.5.7
EXHAUST TEMPERATURE PROTECTION
When exhaust temperature is higher than F45, the machine stops running, and shows the error
code “A24” or “A25”. As soon as exhaust temperature drops to (F45-10ºC), the machine will run
again (each compressor works independently).
But if within an hour we have 3 alarms of this protection, the system will be blocked in alarm
status. In order to unblock the system, manual reboot is needed.
6.5.8
THE WATER TEMPERATURA DIFFERENT IS TOO LARGE
PROTECTION
The difference between inlet and outlet water temperatures will be controlled by the regulator
for 5 seconds. If the difference is higher than F72, error code "A44" will appear 5 seconds later
and the compressor will stop. If this protection triggers 3 alarms in one hour, the system will
lock down in alarm status. The machine will have to be restarted manually to unlock the system.
6.5.9
LOW TEMPERATURE LIMITS THE COMPRESSOR RUNNING
If externa air temperature is < F26
，
the compressors cannot be started (except for defrost
protection in winter). Only the electrical heating can be started.
6.5.10
ANTIFREEZE PROTECTION IN WINTER
This feature is not active when the external air temperature is over 3ºC. If the water in
temperature is below 4ºC and the air temperature is below 3ºC and the machine is OFF or in
stand-by mode the machine will activate the water pump to avoid having the water in the pipes
iced (piping broken).
