MEGAFLO Eco SolaReady, Product Manual

M

AINTENANCE

38

Check solar heat transfer fluid
The heat transfer fluid must be checked every year with regard to its antifreeze and pH value. (7.0 - 9.5) – Check antifreeze 
using antifreeze tester. Target value is approximately -21 deg C (40% concentration). Replace fluid if necessary.

Maintenance of the collector
The collector or the collector array must be checked/serviced annually to check for any damage, leaks or contamination.
In areas where there may be a build up of dirt on the collector, only non-abrasive cleaning materials and methods should be 
used to clean the collectors and mounting system components.

Benchmark™ 
On completion of any maintenance or service of the Megaflo Eco SolaReady, the Benchmark™ “Installation, Commissioning 
and Service Record” should be filled in to record the actions taken and the date the work was undertaken (page 50).

Fault finding
The Fault finding flow diagrams (Fig 32) will enable operational faults to be identified and their possible causes rectified. 
Any work carried out on the Megaflo Eco SolaReady unvented water heater and its associated controls MUST be carried out 
by a competent installer for unvented water heating systems. In case of doubt contact the Megaflo Eco SolaReady Service 
Department.

Fault finding

Solar differential temperature controller error messages
1. Some system failure modes can be recognised by the solar differential temperature controller and will be indicated by an 
error message on the controller display. Refer to the table below for details of possible errors and suggested measures to 
rectify.
NOTE: These error messages wil automatically reset when the fault has been rectified. In the case of the circulation error this 
may take a few minutes to clear once normal flow has resumed.

42

© Baxi Heating UK 2012

14.0

Fault finding

14.1

Failures with error message

1. Some system failure modes can be recognised by the solar
differential temperature controller and will be indicated by an
error message on the controller display. Refer to the table
below for details of possible errors and suggested measures to
rectify.

NOTE:

These error messages wil automatically reset when

the fault has been rectified. In the case of the circulation error
this may take a few minutes to clear once normal flow has
resumed.

Error representation on display Possible reasons

Measures

• Sensor wire broken

• Check wire

• Sensor defect

• Check sensor resistance, if necessary exchange sensor

• Sensor missing

• Check parameter settings and sensor installation

requirements

• Short circuit in sensor wire

• Check wire

• Sensor defect

• Check sensor resistance, if necessary exchange sensor

• Error in pump connection

• Check cabling

• Pump defect

• Exchange pump

• Air in the system

• Check the float of the flow meter moves

when the system runs (if visible)

• Connection with flow 

• Check wire

meter defect

• Sensor wire broken

• Check wire

• Sensor defect

• Check sensor resistance, if necessary exchange sensor

• Sensor missing

• Check parameter settings and sensor installation

requirements

!

!

!

+

Circulation error:  no flow

Additionally at energy
productivity measurement:

flashing

flashing

flashing

% volume

Density at 20ºC g/cu.cm

Refractive Index nD20

Frost protection ºC

25

1.023

1.3627

-10

30

1.029

1.3690

-14

35

1.033

1.3747

-17

40

1.037

1.3801

-21

45

1.042

1.3855

-26

50

1.045

1.3910

-32