T
T
a
a
b
b
l
l
e
e
2
2
0
0
R
R
e
e
a
a
s
s
o
o
n
n
s
s
F
F
o
o
r
r
E
E
r
r
r
r
o
o
r
r
D
D
i
i
s
s
p
p
l
l
a
a
y
y
Fault Suggested
Remedy
1
room thermostat connected incorrectly
check or replace cable
2
room thermostat fails to switch off
Replace room thermostat or replace cable
3
Relevant sensor short-circuits in cable or
internally
Replace sensor or identify fault in cable
4
Pump not running; or sticks
Try to release pump shaft or replace pump
power unit
5
Water pressure in CH installation is too low Top up water and find leak, also check for
internal leak in expansion vessel
6
Water pressure in CH installation is too
high
Too much water added, check expansion
vessel pressure, or replace expansion
vessel
7
Fan not connected (plug not inserted)
Install connector
8
Fan is contaminated or dirty
Clean fan blades
9
Fan is defective
Replace fan
10
Gas tap has not been opened
Open gas tap
11
Gas pressure is too low
Check pipes and gas meter
12
Diameter gas pipe is insufficient
Modify gas pipe
13
Fuse A1 defective
Replace fuse
14
Fuse A2 defective
Replace fuse
15
Fuse A3 defective
Replace fuse
16
Gas valve setting high/low incorrect
Set up gas valve with gas analyser
17 Gas valve has no or incorrect electrical
connection
Use the wiring diagram to check the wiring,
check the gas valve connection, check for
any moisture
18 Ignition cable not connected correctly
Check cable for short circuit, overheating,
too close to or crushed by casing
19
Transformer defective
Replace transformer
20 Connector to gas valve not connected, or
moisture inclusion
Moisture inclusion, check the cable sockets,
which must be inserted into connectors
properly, check position of the cable socket,
set if necessary, before moving connector
21
Pump connector not connected correctly
Check whether the connector(s) fit together
properly, with the appropriate pressure
22 Syphon blocked
Open the flushing pipe (bottom left of the
back panel) by taking the cap off. Hold a
bowl underneath to collect any water that
may escape. Pinch pipes to both to the
upper left and the upper right. Rinse sypon
trap. If necessary, take the burner unit from
the unit and pour water into the heat
exchanger to rinse the syphon.
23 Open and close manual bleed valve after
bleeding
Bleed and vent as required
24
Three-way valve contaminated
Isolate and drain boiler water. Disassemble
the three-way valve by tilting the mounting
springs 90
°
. Remove the motor by pulling
the hairpin spring from the house and
inspect the three connecting feet of the
three-way valve.
25 Too much resistance in the flue system or
flue system blocked
Check the supply and discharge pipes for
blockages
Page 52
eco hometec (uk) ltd.
