IDEAL LOGIC HIU Direct MT, Установка и обслуживание, Страница: 28 / 32

FAULT FINDING
28
LOGIC HIU -
Installation & Servicing / Users
60 FAULT FINDING
Fault Indications Possible Cause of Fault Operations to be Performed
The water is
not heating
DHW LED on
primary circuit isolating valve closed open the isolating valve
modulating valve actuator connector disconnected reconnect actuator connector
modulating valve actuator disconnected from
valve body
reconnect actuator
modulating valve actuator faulty call qualified personnel to have it replaced
DHW temperature probe cable inverted with
heating probe
restore correct connection
presence of air in the system restore correct connection
electronic controller not working call qualified personnel to have it replaced
valve obturator blocked in closed position call qualified personnel to have it replaced
centralised system not working contact person in charge of system
FAULT LED lit +
error code
6 active
DHW temperature probe disconnected reconnect probe
DHW temperature probe faulty call qualified personnel to have it replaced
FAULT LED lit +
error code
79 active
DHW temperature probe faulty restore correct switch setting
DHW LED off
DHW priority flow meter disconnected reconnect flow meter
DHW priority flow meter faulty call qualified personnel to have it replaced
all LEDs are off
electricity power supply switched off switch on electricity supply
protection fuse burnt out call qualified personnel to have it replaced
The water is
hot but does
not reach
the desired
temperature
DHW LED on
domestic water cycle temperature set point too
low
increase set point
HIU strainer clogged call qualified personnel to have it serviced
exchanger partly clogged call qualified personnel to have it serviced
modulating valve actuator faulty call qualified personnel to have it replaced
valve obturator blocked in intermediate position call qualified personnel to have it replaced
modulating valve actuator connector disconnected reconnect actuator connector
DHW temperature probe cable inverted with
heating probe
restore correct connection
excessive demand for DHW decrease demand
electronic controller not working call qualified personnel to have it replaced
centralised system temperature insufficient contact person in charge of system
primary circuit flow rate insufficient contact person in charge of system
The hot water
temperature
reached is
too high
DHW LED on
domestic water cycle temperature set point too
high
decrease set point
DHW temperature probe cable inverted with
heating probe
restore correct connection
modulating valve actuator faulty call qualified personnel to have it replaced
valve obturator blocked in intermediate or open
position
call qualified personnel to have it replaced
electronic controller not working call qualified personnel to have it replaced
Hot water
flow rate is
insufficient
DHW LED on
HIU strainer clogged call qualified personnel to have it replaced
possible domestic water system shut-off valves
partly open
open the valves
centralised domestic circuit cold water flow rate
insufficient
call qualified personnel to have it serviced
There is no hot
water flow
DHW LED off
possible domestic water system shut-off valves
closed
open the valves
no cold water in centralised domestic circuit call qualified personnel to have it serviced
HIU strainer completely clogged call qualified personnel to have it serviced
heat exchanger completely blocked call qualified personnel to have it serviced