COSMOGAS FRYO 6PI, Instructions For Installation, Use And Maintenance Manual

Page: 42 / 60

42 FRYO PI
COSMOGAS
8 - DIAGNOSTIC
Code Description Operation status Possible causes and solutions
00 P7 Low water flow protection
The unit restarts after 3
minutes
The water flow rate is less than the minimum allowed. If
the problem occurs 3 times in a given time the system
will not reboot, then power off for 30 seconds and then
power on again to restart. Check the hydraulic circu -
it, paying particular attention to the filters. Check the
operation of the pump. Check the operation of the water
flow switch.
00 P8
Flow water temperature too low in
cooling
Compressor stopped
The compressor stops if the water outlet temperature is
below 5 ° C in cooling. Check that the temperature sen -
sor is well connected and working. Check that the supply
temperature setpoint is not too low (section 7.2.4). Check
that the water flow rate is not too low.
00 P9
Water supply temperature too high in
cooling or DHW
Compressor stopped
The compressor stops if the water supply temperature is
higher than 57 ° C in heating or DHW. Check that the he -
ating or DHW flow temperature sensor is well connected
and functioning. Check that the supply temperature
setpoint is not too high (section 7.2.4). Check that the
water flow rate is not too low.
00 Pa Water supply temperature too in defrost
The compressor stops
defrosting and goes back to
heating or DHW production
When the appliance works in defrosting, if the supply
water temperature is too low it could freeze in the plate
heat exchanger, damaging it. When this happens the ap -
pliance stops defrosting and returns to produce hot water
for heating or DHW. The evaporator may freeze. Increase
the required heating or DHW temperature (chapter 7.2.4).
If the system water volume is too low, the temperature
will drops too low during defrosting, it is necessary to
add a tank to increase the capacity of the circuit. Check
that the supply water temperature sensor and the cooling
temperature sensor are not reversed.
00 Pb
Supply water temperature too low in unit
1 during defrost
System 1 compressor stops
defrosting and switches back
to heating or DHW produc -
tion
When the appliance works in defrosting, if the supply
water temperature is too low it could freeze in the plate
heat exchanger, damaging it. When this happens the
appliance stops defrosting and returns to produce hot
water for heating or DHW. The evaporator may freeze.
Increase the required heating or DHW temperature, or
start the back-up heating system. If the water volume of
the system is too low, the temperature will drop too much
during defrosting, it is necessary to add a tank to increa -
se the capacity of the circuit. Check that the water supply
and internal coil temperature sensors are not reversed.
00 Pc Level 1 antifreeze water protection
The pump runs for one minu -
te every 6 minutes
When the appliance is OFF, if the outdoor temperature
and the water temperature are too low, the water could
freeze. Then it becomes necessary to start the pump.
00 Pd Level 2 antifreeze water protection
The compressor starts auto -
matically
When the appliance is OFF, if the outdoor temperature
and the water temperature are too low, the compressor
starts automatically to heat the water beyond a certain
value. In accordance with current regulations, antifreeze
could be added to the system water.