Immergas INOXSTOR 200, Installation, Usage And Maintenance Instructions

9.  TROUBLESHOOTING

Fault

Possible Causes

Remedial measures

Water not heating

Electrical supply fault

Check electrical supply.  Verify the operation of Audax and 

Inoxstor controls.

Legionalla control not 

working (temperature 

does not reach 60°C)

Thermostat fault

Check immersion high limit thermostat operation, replace if 

necessary

Anti-Legionella Timer incorrectly set

Check settings and operation of anti-legionella timer.  Replace 

if necessary.

Discharge of water 

from Pressure Relief 

Valve (continuously)

Excessive supply water pressure

Check Pressure Reducing Valve is fitted and operational.  Re

-

place Safety Group if necessary.

Faliure of Pressure Relief Valve

Check valve is seating properly.  Replace Safety Group if nec-

essary.

Discharge of water 

from Pressure Relief 

Valve (intermittently)

Inadequate expansion in system

Check expansion vessel size and pre-charge pressure.

Water supply pressure exceeds 3.5 bar

Check Pressure Reducing Valve is operational.  Replace Safety 

Group if necessary.

Water or steam from 

Pressure Relief Valve

Thermostat fault

Check operation of high limit thermostat.  Replace if neces-

sary.

No water flow

Inlet valves incorrectly fitted

Check all valves are correctly installed in accordance with flow 

direction arrows

Supply water not turned on

Check water supply is on

Blockage in water supply

Check for obstructions. If a pressure reducing valve is fitted 

check strainer is not blocked.

Milky water                    

 Oxygenated water

Water from a pressurised system releases oxygen bubbles 

when flowing. The milkiness will disappear after a short time.