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3
Cooling Fan(s) not
operating
Any one particular fan
not running
Front door fans not
operating or back door
fans not running.
Particular cooling fan may be faulty.
This is normal as the fans will operate
only when the set temperature of the
thermostat exceeds the set point.
Check the voltage supply (230V) across
the fan terminal. If voltage supply is
correct, it is likely that the fan has
developed fault. Replace the fan with a
similar fan.
When the temperature reaches the set
point, the fans will start automatically.
In case the fans do not operate despite
the temperature is higher than set
point, the unit will safely trip the
capacitor banks. The unit will need off-
line investigation to check the integrity
of the thermostats.
4
iSaver controller mains
voltage shows er-
ratic readings or displays
zero.
Voltage module output (PT input for
the iSaver) voltage may have failed
Check the output voltage of voltage
module corresponding to the input
voltage. (20VAC to 24VAC).
If output voltage fails. Voltage module
may have failed. Replace the voltage
module.
If the input to the voltage module fails.
Check the fuse links.
5
iSaver controller does
not switch on the
capacitor banks and the
alarm indication glows.
Over voltage alarm
Over current alarm
Zero voltage alarm
Zero current alarm
Over temperature (chamber 1 or
chamber 2) alarm
Incoming voltage may be constantly
high. (More then 10%). When voltage
becomes normal, the iSaver will start
functioning.
Mains current is more than 120 % of
CT primary.
When current returns to normal, the
iSaver will start functioning normally.
Voltage module output (PT input for
the iSaver) may be failed
Check the voltage module and replace
if required.
NO load or the CT connection is open.
iSaver temperature (chamber 1 or
chamber 2) is high.
Check cooling fans, and fan thermostat
are functioning.
