Breakdown Diagnostics; Maintenance - York GEYSIR VARIO RANGE User Manual

MAINTENANcE

Thermostatic expansion valve (heat pumps)
Equipment with heat pump is equipped with
thermostatic expansion valves.
correct overheating checking:
Determine the evaporation temperature (Tsa) by
manometers connected to the suction side.
Determine the intake side temperature (Tse) by the
help of thermometer measured on the evaporator
output.
Calculate, from this values, the overheating:
S = Tse - Tsa

BREAKDOWN DIAGNOSTIcS

Breakdown
Equipment runs but does not
give any performance.
Suction pipe freezing
Equipment noisy operation
Lack of oil in the compressor
Compressor does not start-up
Pump does not start
You can stop the overheating, in case of necessity,
with the expansion valve.
The value of overheating should be from 3 up to 4 K.
If the expansion valve does not react to adjustment
change, than there is either an incorrect filling
volume or the valve has got a failure, and it
should be replaced. The valve may by replaced by
authorised servicing personnel exclusively.
Possible reason
Unsatisfactory cooling medium level.
Too low brine temperature.
Incorrect overheating adjustment.
Too low brine temperature.
Unsatisfactory cooling medium level.
Vibrating piping.
Compressor noisy operation.
System untightness
Mechanical failure of the compressor. Consult the service point.
Current circuit is not switched on.
No right turning magnetic field.
High- or low- pressure failure.
Control voltage disruption.
Loosen connections at the terminals.
Inadequate voltage level.
Compressor winding short circuit.
Compressor blocked
Equipment is not released.
Control voltage disruption.
Loosen connections at terminals.
Insufficient voltage.
Compressor winding short circuit.
Compressor blocked
Elimination
Check and repair untightness, and fill in.
Consult the service point.
Revise the overheating adjustment.
Consult the service point.
Check and repair untightness, and fill in.
Tighten the ping.
- Valve position checking (opened?).
- Bearing damage.
- Check the compressor anchoring tightness.
Check and repair untightnesses, and fill in.
Check the current circuit and fuses.
Change phase order.
Determine this failure reason.
Check the current circuit and fuses.
Tighten the terminals.
Check your power supply source.
Consult the service point.
Consult the service point.
Check the time program settings.
Check the current circuit and fuses.
Tighten the terminals.
Consult the service point.
Consult the service point.
Consult the service point.
EN
21
ENGLISH