Fault Displays And Fault Finding - Powrmatic MC200/V3 Installation & Servicing Manual

3.1 Fault displays and Fault Finding

Heater Lockout
'Heater lockout' appears on he display if the MC200
receives a fault voltage onto terminal 7. The Fault LED will
also be illuminated.
.
8.5 C 09:42
Heater lockout
The lockout can be cleared by pressing the reset button on
the front of the controller. This will send a pulse of neutral
back up to the heater to remove the lockout condition.
If the lockout continues to display once the reset has
been pressed, it may mean the interconnecting reset
cable to the heater is not wired correctly or the heater
has developed a permanent fault that requires a service
engineer to identify.
Sensor Fault
'Sensor fault' appears when there is a break in the circuit
between terminals 'SEN1' and 'COM' or if fitted, 'IN2 and
'COM'.
.
8.5 C 09:42
Sensor fault
This could be either a faulty sensor bead, an incorrect
terminal connection or a break in a cable.
Clock Fault
'Clock failure' will appear on the screen if the in-built
battery has gone flat. This specially occurs if the power has
been turned off to the controller for a long period.
.
8.5 C 09:42
Clock failure
Leave the power connected for at least 48hrs to re-charge
the battery (one whole week is more realistic dependent
on the age of the battery itself)
Also check the ribbon cable between the two pcb's is
making good contact
page no. 22 of 24
Service Date
When the MC200 is installed the Commissioning Engineer
may have entered a date for when the heating equipment
requires servicing.
When this date is reached the MC200 fault indicator will
Tue
be illuminated and the display will alternate between the
normal display and "Service due, call engineer".
The Service Engineer can clear this display by entering a
new service date when the heating equipment has been
serviced.
Blank Screen
A blank screen is present on the display but the backlit
light is still on.
Tue
Before replacing the MC200 ensure the controller has been
powered up for more than 48hrs.
If the screen is still blank, isolate the power and remove the
controller facia pad. Ensure the ribbon cable is connected
to the pcb and pushed in tightly to its terminal housing on
the backboard.
*With the power back on check the display. If still blank,
push the power reset button on the rear of the pcb.
Tue
*only be undertaken by a competent person.
If the screen remains blank, contact Powrmatic technical
department.
MC200/V3
Users, Installation & Servicing Instructions Doc Ref M401 issue 5.4 Feb 2018.
S ervice due,call
engineer