Inverter Alarm (0); Heater Overheat Alarm - ComfortZone RX35 User And Installation Manual

ComfortZone RX35/RX50/RX65
Measure:

13.5 Inverter alarm (0)

Cause:
Measure:

13.6 Heater overheat alarm

Cause:
Measure:
(V) Expansion valve / motor / control error.
(W)The alarm may also be due to interruptions in the LP2
alarm circuit.
(X) Rarely, the expansion valve's smallest opening can
be too small.
- Stop the alarm. If it cannot be stopped, it is because all
refrigerant has leaked or because it is a loose contact in the
alarm circuit.
If the alarm cannot be stopped:
- Check the alarm circuit by shorting the flat pins on the low-
pressure switch. If the alarm can then be stopped, the alarm
circuit is complete and all refrigerant has probably leaked,
otherwise it will interrupt the alarm circuit.
If the alarm can be stopped:
- Check that the fan is working.
- Check that the filter is not clogged and replace if necessary.
- Check that air adjustment is made.
- Check that the air ducts are not clogged.
- Increase the fan speed.
If the alarm still comes back after a few minutes of operation:
- Check the expansion valve's function by studying
overheating and valve opening in the menu Advanced
settings / Measurements / Expansion valve/
The valve position is automatically controlled by a feedback
control so that the value Temperature diff is about the same as
the value Estimated setting but valve position varies. If the
valve works properly then decrease Temperature diff to
increase Valve position.
After five minutes of operation, the value of Temperature diff
should be maximum +/- 10 K from Estimated setting.
- If no error was found, analyze the log file for error Cause.
The inverter has detected an error.
- Turn off the main power switch and leave it off for 10
seconds. When the power is turned on again, no errors
should be indicated on the display.
(Y) Reset the alarm
(Z) If the alarm reactivates, contact your service provider.
This means that the protection alarm for the element of the
additional heat source has been activated.
This is usually due to poor circulation.
May also be because connector X9 (auxiliary heater) is not
connected or due to a fault in the control card.
- Check the pressure on the manometer.
48
service & maintenance