16
Disconnect the electrical supply before removing the terminal cover. It is
recommended that any service operations on the Aquaheat heater are carried out by
a competent person.
FAULT
POSSIBLE
CAUSES ACTION
Water not heating
1. Electrical supply fault
1. Check electrical supply
2. Thermal cut-out tripped 2. Check cut-out, if operated
reset and check thermostat
operation. If necessary replace
thermostat/thermal cut-out
(see Wiring Diagram)
3. Thermostat fault
Check thermostat operation
Replace if necessary.
Discharge of water from
Excessive mains water
Fit Pressure Reducing Valve
pressure relief valve
pressure
Pack U1 and U2
pressure (continuously). (see IMPORTANT
INSTALLATION POINTS)
Discharge of water from
1. Expansion in mains not 1. Fit Pack U2 (see IMPORTANT
pressure relief valve
possible
INSTALLATION POINTS)
(intermittently).
2. Mains pressure exceeds 2. Fit Packs U1 and |U2
0.41 Mpa (4.1 bar)
3. Pack U1 fitted without 3. Fit Pack U2 when using Pack
Pack
U2
U2
4.Pressure Relief Valve Fault 4. Replace Pressure Relief Valve
5. Loss of pressure from
5. Check and, if necessary,
Expansion
Vessel
re-charge
Expansion
Vessel
pre-charge
pressure
(see
section
9.0)
Discharge of water from
Thermostat and
Replace thermostats and
Temperature/Pressure
thermal cut out fault
thermal cut outs
relief valve and/or
water/steam from
pressure relief valve
No water flow
1. Inlet valves incorrectly
Check all valves are correctly
fitted
installed
in
accordance
with
flow
direction
arrows
2. Mains water supply not
2. Check mains water supply
turned
on is
on
3. Blockage in main water
Check for obstructions. If Pack
supply
U1 is fitted check the strainer
is
not
blocked
"Milky water"
Oxygenated water
Water from a pressurised
system
releases
oxygen
bubbles
when
flowing.
The
milkiness
will
disapear
after
a
short
while.
7.0 FAULT FINDING
Summary of Contents for Aquaheat AH30V
Page 11: ...11 FIGURE 05 WIRING DIAGRAM ...