14
6.1 Faults and fixes
If problems arise when the product is in use,
check for possible faults and fixes in the table. If
the problem is not shown in the troubleshoot-
6. TROUBLESHOOTING
ing table or you are unsure what is wrong, con-
tact the installer (see type plate on the product)
or OSO Hotwater AS - see section 7.2.
TROUBLESHOOTING
Problem
Possible cause of fault
Possible solution
There is leakage/dripping
from the safety valve/
there is often water on the
floor by the cylinder in the
morning
Pressure reduction valve, water meter
or blocked non-return valve on the
water intake.
Water pressure into the home is too
high.
Fit AX expansion vessel with absorbs ex-
pansion during heating, and fit pressure
reduction valve for stable water pressure
inside the home. The pressure reduction
valve is adjusted in according to the pres-
sure in the expansion vessel. Contact auth.
installer.
The safety valve is worn or there are
particles stuck between the mem-
brane and the valve seat because the
water is dirty
Try to flush with water through the safety
valve. Open valve for approx. 1 minute. See
section 5.2. If the valve still leaks, it must be
replaced. Contact auth. installer.
Leak from heating element.
Verify as follows: a) cut the electric sup-
ply, b) unscrew the cover, c) visually check
whether there is a leak from the heating
element. If so, replace the gasket/heating
element. Contact auth. installer.
No hot water
Power supply interrupted.
Verify that the fuse is on / the plug is
plugged in to the wall contact / the earth
breaker has not tripped.
Thermostat has cut out.
Press the ‘RESET’ button on the safety ther-
mostat; see ‘User guide’.
Heating element is defective.
Replace heating element. Contact auth.
installer.
Leak in hot water pipe
Check the hot water pipes and taps in the
house for leaks. If a leak is detected: Con-
tact auth. installer.
Not enough hot water
High consumption in the home.
Raise the temperature on the thermostat
to the maximum; see ‘User guide’.
Switch to a larger OSO water heater. Con-
tact auth. installer.
Not high enough tem-
perature
The thermostat is set for low tempera-
tures.
Raise the temperature on the thermostat
to the maximum; see ‘User guide’.
Change from cold to hot water in taps. Contact auth. installer.
Fuse/earth breaker trips
repeatedly
Possible fault in the heater’s electrical
system.
Verify as follows: a) cut the electric supply,
b) unscrew the cover, c) visually check the
junction box for any problems. If so, con-
tact auth. installer to check. Fit the cover.
Knocking in the pipes
when the hot tap is closed
Large pressure increase when the tap
is closed quickly.
Completely normal. Fit AX expansion ves-
sel if troublesome. Contact auth. installer.
