PKG-SVX19B-E4
60
PROBLEM
POSSIBLE CAUSE
CHECK/CORRECTIVE ACTION
THE ROOM
TEMPERATURE IS TOO
HIGH
A) The parameter settings on the control panel
are not correct.
See control panel instruction manual
B) The air flow is low or absent.
See “LACK OF / ABSENT AIR FLOW”.
C) The temperature sensor is not working.
Check the electrical connections and the control
configuration.
D) The thermal load is higher than expected.
Check the room’s thermal load.
E) The three-way valve is not working.
Check the electrical connections of the
servomotor valve.
Open the valve by means of the manual control
knob.
Check the chilled water supply; check that the
shut-off valves are open.
F) There is an insufficient chilled water flow.
Check the chilled water funtion.
G) The chilled water temperature is too high.
See “THE COMPRESSOR(S) DOESN’T / DON’T
WORK”.
ROOM TEMPERATURE
TOO LOW
A) The parameter settings on the control are not
correct
See the microprocessor control manual.
B) There is insufficient power supply to the
elcttric heaters or the heaters are not working
1) Check that the IM of the heating element is
armed.
2) Check the electric feeding circuit of the heaters.
3) If there is a heater alarm, remove the cause and
re-set the safety thermostat.
C) The hot water coil is not working.
1) Check the hot water capacity and temperature.
2) Check the function of the regulation valve (see
valve and servomotor).
D) The hot gas coil is not working during
dehumidification with re-heat.
1) Check the hot gas 3 way valve function.
2) Check the function of the compressor serving
the re-heat. See “THE COMPRESSOR(S)
DOESN’T / DON’T WORK”.
E) The three way valve of the chilled water circuit
is blocked open.
Close the valve using the manual control knob and
replace the servomotor.
PROBLEM
POSSIBLE CAUSE
CHECK/CORRECTIVE ACTION
THE UNIT DOES NOT
START
A) No power supply to the unit’s electrical panel. Check that the power is on and the unit main
switch on the electrical panel is closed.
B) No power to the auxiliary circuits.
1) Check that the IM automatic circuit breaker on
the AUX circuit is set.
2) Check the fuse on the main board.
C) The control panel does not start the unit.
Check that the control panel connectors are
correctly located in their sockets.
Troubleshooting
Troubleshooting is made easier by the indications on the control panel display: when an alarm signal is displayed, consult
the control panel instruction manual. If necessary, call the nearest Service Centre describing the nature of the fault and
its possible cause displayed on the control.
TEMPERATURE CONTROL
