Vesttherm VT3130 Mode D'emploi Et D'installation page 16

The "FanPause" function improves the operation of the DHW HP in humid environment (bathroom, laundry, basement...).
This function forces the draining of condensation water recovery box, in order to prevent overflow. When activated the fan
will stop either for 15 or 30 seconds per full operating hour. An interruption of the HP fan operation (e.g. because the water
temperature set point has been reached) resets the "FanPause" function timer. The timer restarts together with the HP
operation. If "FanCon" is activated, the "FanPause" function will interrupt the fan operation after every full operation hour.
If "FanPause" is set to "Off" then the function is deactivated.
ALARM LEVELS AND HANDLING
There are 3 alarm levels. The display can show 3 different alarms at the same time. The alarm must be acknowledged and
reset by pressing the rotary/push button.
Level 1 - The information alarm: does not affect the HP operating, but informs the user that there is a problem, which
might need action and should be resolved as soon as possible. (Alarm no. 8, 9 and 10).
Level 2 - The cooling circuit alarm:: This alarm level stops the DHW production via HP. If a supplementary heating is
chosen in the "Heatpump" parameter menu ("HP + FL", "HP+boil", "EL", or "boil"), DHW is generated by the
supplementary heating up to the DHW "SETPOINT" temperature. (Alarm no. 3, 4, 5 and 6).
Level 3 - DHW HP alarm: The DHW production will cease completely. A severe malfunction or defect is supposed. This
alarm level needs the intervention of your installer or the manufacturer's after-sales-service. (Alarm no. 1 and 2)
The user can see the alarms in the alarm menu, where also the alarms are acknowledged. The problem/defect has to be
settled and the alarm has to be acknowledged, before normal operation resumes. If there are simultaneous alarms, the alarms
are displayed (up to 3 alarms) in a sequence, according to their priority.
Special handling of Pressostat switch alarms (alarm 5 & 6)
The Pressostat switch protects the compressor and the cooling circuit against overpressure. At the first time the problem
comes up, alarm nr.5 is displayed and the HP stops operating. LED (29) is flashing in red until the problem is solved
(pressure is normal again), The now resumes normal operating mode automatically. (LED indicator: standby mode = orange
light; HP operating mode = green light). If alarm 5 persists, call your installer.
Should a Pressostat problem occur again in less than 6 hours after the first alarm, alarm nr.6 is displayed and the HP stops
operating. Call your installer! LED (29) is flashing in red until the problem is solved (pressure is normal again) and the
alarm acknowledged by pressing the rotary/push button, The LED (29) now flashes in orange. When the alarm is reset, the
HP will restart and LED (29) turns for constant light (standby mode = orange light; HP operating mode = green light).
LED INDICATOR STATUS:
LED
(29) for HP flashes red: Information- or coolant system alarm.
Both LED (29 + 30) flash: DHW HP alarm, no DHW production possible.
ALARM OVERVIEW:
Alarm Nr. LED indicator:
No. 29
1 X
(red)
2 X
(red)
3 X
(red)
4 X
(red)
5 X
(red)
6 X
(red)
8 X
(red)
9 X
Possible problem or defect
No. 30
X DHW temperature sensor is short
(red) circuited
X DHW temperature sensor is cut-off
(red)
Evaporator temperature sensor short
circuited
Evaporator temperature sensor cut-off
First Pressostat alarm
Second Pressostat alarm
Temperature sensor „Temp 1" short-
circuited.
Signal anode worn.
Remark/action
No DHW production, HP and supplementary
heating are cut off. Call your installer.
No DHW production, HP and supplementary
heating are cut off. Call your installer.
Compressor stops operating
Compressor stops operating
Compressor stops and restarts automatically, if
the problem has disappeared (pressure back to
normal level), reset is possible
Compressor stops and restarts only after resetting
and user acknowledgement.
Information only
Inform your installer and ask for maintenance.
15