IDEAL he24 Installation And Servicing

61
FAULT FINDING
FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING
Esprit - Installation and Servicing
Does the pump setting give a differential
across the boiler in excess of 25
o
C ?
Can the overheat condition be reset by pressing
the boiler reset button when the system is cold ?
Replace the system pump
Set CH control knob to maximum.
If the overheat trips again measure the flow temp:
Over 90
o
C Check control thermistor
(Refer to Frame 90)
Under 90
o
C Replace overheat 'stat
YES (also refer to Frame 88)
YES
Check that the pump is rotating freely.
Is differential now below 25
o
C ?
NO
NO
87 L.....A..... (OVERHEAT ERROR)
Fill and vent the system and open all
isolation valves
YES
Is the boiler and CH system filled with
water and all isolation valves open ?
OK
NO
YES
NO
Replace overheat thermostat
89 L....8..... (FAN ERROR)
Is nominal 330 V DC present across
red and blue at the fan connector as
reset button is pressed?
Replace fan
YES
NO
Replace harness
Replace PCB
YES
Is 14V DC present across
yellow and pink at the fan
connector?
Check wiring harness for continuity.
Is there continuity?
NO
YES
NO
88 L.....E..... OR L.....A..... (WATER PRESSURE SWITCH)
Is 230V available across the water pressure
switch electrical leads
Can the overheat condition be reset by pressing
the boiler reset button when the system is cold ?
YES (also refer to Frame 86)
NO
Replace PCB
NO
Fill and vent the system and open all
isolation valves
NO
Is the boiler and CH system filled with water
with a minimum pressure of 1.0 bar (cold)
and all isolation valves open?
YES
Replace water pressure switch
Note.
LE occurs when boiler is cold.
LA occurs when boiler is hot.
YES
OK
Note. With V9 Primary Control PCB, overheat LA/HA or H9/L9 when
reset will display 3 horizontal lines and will not attempt to refire until
the temperature in the heat exchanger drops below 50
o
C.
Note. With V9 Primary Control PCB, overheat LA/HA or H9/L9 when
reset will display 3 horizontal lines and will not attempt to refire until
the temperature in the heat exchanger drops below 50
o
C.

IDEAL he24 Specifications

General

Brand	IDEAL
Model	he24
Category	Boiler
Language	English