andrews 24/39, Installation Manual, Operation And Service Manual

Page: 47 / 96

Checking “Correx” Anodes
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 HIfllo; 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.
47
FAULT FINDING SECTION 8
AUTO
IGNITION
UNITS
HI-FLO
MODELS
FAULT ACTION
CONTINUOUS (a) Check gas service cock is open.
IGNITION NO (b) Check gas control knob is ON.
PILOT FLAME (c) Check ECO for failure.
PILOT LIGHTS BUT (a) Main gas valve not energised, opal light is on. Check for
MAIN BURNER loose contacts.
DOES NOT (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.
FLUE DAMPER (a) Faulty damper unit- replace.
REMAINS OPEN (b) Power is being interrupted to the unit.
WHEN BURNER IS OFF
NO (a) Electrical ON/OFF switch is not ON.
IGNITION AT PILOT (b) Thermostat set too low.
(c) Power to unit interrupted.
(d) Flue damper not open - faulty unit, replace.
AUTO
IGNITION
UNITS
STANDARD
RANGE
FAULT ACTION
NO (a) Check gas service cock is open.
IGNITION AT PILOT (b) Electrical ON/OFF switch is not ON.
(c) Power to unit interrupted.
(d) Thermostat set too low.
(e) Check ECO for failure. Reset.
(f) Check for 24V AC at intermittent pilot ignition control
terminal No. 1. Replace control if faulty.
(g) Faulty Solenoid Coil. Replace if faulty.
PILOT LIGHTS BUT (a) Check for 24V AC at intermittent pilot ignition control
MAIN BURNER terminal No. 3. Replace control if faulty.
DOES NOT (b) Faulty Solenoid Coil. Replace if faulty.