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Troubleshooting
FAULT
POSSIBLE CAUSE
REMEDY
No water flow from hot taps.
1. Mains supply off.
2. Strainer blocked.
3. Cold water inlet Pressure Reducing
Valve incorrectly fitted.
1. Check and open stopcock.
2. Turn off water supply. Remove strainer
and clean. (See Pressure Reducing Valve
page 6 Installation Manual)
3. Check and refit as required (see item 3
page 5 of installation manual).
Water from hot taps is cold.
1. Immersion heaters not switched on.
2. Immersion heater thermal cut-out has
operated.
3. Programmer set to central heating or
not switched on.
4. Boiler not working
5. Cylinder thermal cut-out has operated.
(Indirect units only).
6. Motorised valve not operating correctly.
1. Check and switch on..
2. Check and reset button. (See
thermostat diagram page 9 and safety
cut-out on page 4 of installation
manual).
3. Check and set to hot water.
4. Check boiler operation. If fault
suspected, consult installer or boiler
manufacturer.
5. As at No.2
6. Check wiring and/or plumbing
connections to motorized valve.
Intermittent water discharge
1. Reduced internal expansion.
2. Thermal control failure. (Note Water will
be hot).
1. Repressurize expansion vessel. Follow
cold water discharge instructions on
page 4.
2. Switch off power to immersion heater(s)
and boiler supply to the unit. When
discharge has stopped, check thermal
controls, replace it faulty.
Contact a
competent person.
Continuous water
discharge
1. Cold water inlet Pressure Reducing
Valve not working
2. Temperature and pressure relief valve
faulty.
3. Expansion relief valve not working
correctly.
1. Check pressure from valve if greater
than 2.1 bar replace. (See page 6 of
installation manual).
2. As No2 of above.
3. Check and replace if faulty. (See page 6
of installation manual).
Room thermostat does not switch on or
not work properly
Wireless room thermostat batteries not
Working
Replace new batteries for wireless room
thermostat
•
Disconnect electrical supply before removing any electrical equipment covers.
NOTE
EHS mono_RC***MHXGA_IM_E_34411A(3).indd 55
2012-11-26 오후 3:02:06