Marlec Solar iBoost+ User manual

SiB FFv3 070818 www.solariboost.co.uk 7
Troubleshooting Guide 2
This document provides support to installers to trace and resolveissues at the
installation stage or during service. Symptoms covered in this document are:
• Incorrectly Displays “Water TankHot” or “Heating by Solar 0.00.”
What is the Solar iBoost Connected to? -Pay attention to:
1. It should be connected electrically from the Solar iBoost directly onto the
immersion which is a purely resistive load. The immersion should be rated
≤3kW and it MUST have a built-in thermostat.
2. There mustnot be any electronic, relay or contactor switching devices
between the Solar iBoost and the immersion. Additional system controls
may conflict with the controlled power output of Solar iBoost. Where a
thermostat has a neutral terminal the installer should check that the load
remains purely resistive.
CAUTION! Connection through switching devices may cause irreparable
damage to the Solar iBoost invalidating the warranty.
Check the Boost function is working?
Press the“Boost” button to display on for 15 minutes
as shown. You should become aware of the
immersion cutting in to run from the grid within about
1 minute and the displaywill count down minutes.
Scenario 1—Water Tank Hot display returns but tank is not hot.
The electrician should perform these tests:
• A continuity test of the thermostat.
• A continuity and resistance (20 Ohms) test of the immersion rod.
Defective components should be replaced as required and the system
re-commissioned. Where 2 immersions are installed both should be tested. If
the secondary immersion thermostat has tripped further investigation of the
causes are recommended.

SiB FFv3 070818 www.solariboost.co.uk 8
Check the Clamp
- this is only necessary in the case of Water Heating Off
showing incorrectly or Heating by Solar 0.00
1. Read First Steps Fault Finding Guide 1 to ensure that
the clamp installation is correct. Pay particular attention
thatthe clamp is firmly engaged at the latch.
2. Check that the clamp is not under any strain from hanging on the live cable.
When the clamp closes the ferrite cores should squarely meet. Reposition
the clamp on the cable if necessary.
3. Open the clamp and inspect the ferrite cores for damage. If broken contact
the supplier to replace the clamp.
4. Open the clamp and inspect the ferrite cores to seethat they areseated
firmly in their locations.
5. Pinch the clamp together tightly with a cable tie and check the Solar iBoost
to see if it starts up. Ensure all the working conditions are met, ie >100W
(>200W in original version) of export is available, etc.
6. If the Solar iBoost starts up release the cable tie, ensure thereis no strain on
the clamp causing it to separate and check the system again. If it does not
function contact the supplier to replace the clamp.
Scenario 2 — the Boost function continues to work.
1. Stop the boost function by scrolling through the Boostbutton untilManual
Boost ceases.
2. Consult the Connection Diagrams in the installation manual to ensure
compliance. Original model only: ensure the terminal strip link wire is secured.
3. Where a dual immersion system is wiredin, swap the outputs and check for
function.
4. To eliminate a caseof a chattering thermostat itshould be temporarily by-
passed to connect the Solar iBoost directly onto the immersion for testing
only. CAUTION! Do not leave this connection in place as there is no
protection against over heating the water.
Replace defective parts, if the fault continues contact www.solariboost.co.uk
Troubleshooting Guide 2 contd.