Certikin MB50S Service Manual download pdf (Page 27)

Fault Codes

Condensing Pool Heater

22/12/08

DISPLAY

LOCK / RESET

GREEN

YELLOW

RED

LED1

RED

LED2

FRONT PANEL

ON PCB

EXPLANATION

‘P’ alternating with ‘oc’ = Pool sensor open circuit OR No

network detected if a Master in a multiple heater installation

‘P’ alternating with ‘cc’ = Pool sensor short circuit

‘F’ alternating with ‘oc’ = Heat Exchanger

Flow sensor open circuit

‘H’ alternating with ‘oc’ = Heat Exchanger

Combustion sensor open circuit

‘H’ alternating with ‘cc’ = Heat Exchanger

Combustion sensor short circuit

‘F’ alternating with ‘cc’ = Heat Exchanger

Flow sensor short circuit

‘Err’ alternating with ‘4’ = Pool potentiometer open circuit

‘Err’ alternating with ‘5’ = Pool potentiometer short circuit

For all of the above. Turn off, correct problem and turn back

on again and the display and operation will be normal.

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Certikin MB50S Service Manual Page 27