Auto Ignition Units Hiflo Models; Checking "Correx" Anodes - andrews 24/39 Installation And Service Manual

8 Fault Finding
8.4

Auto ignition units HIflo models

Fault
CONTINUOUS
IGNITION NO
PILOT FLAME
PILOT LIGHTS BUT
MAIN BURNER
DOES NOT
FLUE DAMPER
REMAINS OPEN WHEN (b) Power is being interrupted to the unit.
BURNER IS OFF
NO IGNITION AT
PILOT
8.5

Checking "correx" anodes

56
Action
(a) Check gas service cock is open.
(b) Check gas control knob is ON.
(c) Check ECO for failure.
(a) Main gas valve not energised, opal light is on. Check for loose contacts.
(b) Check for 24V AC at intermittent pilot ignition control terminal No. 3. Replace control if faulty.
(c) Check for 24V AC at main gas valve terminals. Replace valve if faulty.
(a) Faulty damper unit- replace.
(a) Electrical ON/OFF switch is not ON.
(b) Thermostat set too low.
(c) Power to unit interrupted.
(d) Flue damper not open - faulty unit, replace.
1. If red light is flashing on power pack, immerse wires in water
including the earth: anode wires (white wires – HIflo x 2 OR
Standard Range x 1; and black earth wire (power pack earth)
low voltage side.
2. If light stays red, replace power pack: E010 – 2 x Anode on
HIflo; C995 – single Anode on Standard Range heaters.
3. If light goes green, investigate: anode rods; poor connection;
bad earth; or too much p.t.f.e. around threads acting as an
insulator (anode part number: E048).
For checking individual Correx anodes – leave one white
wire connected and put the remaining white wire and black
wire into water. If the power pack goes green then this
proves that Anode is OK.
4. If necessary to replace a power pack, it is supplied with a 2
pin "shaver" plug which needs to be connected to an un-
switched, permanent power supply fused ' 3amps. DO NOT
cut off any wire, ONLY the plug.
Issue 2 14/07/16