Marlec Solar iBoost+ Troubleshooting Guide

SiB FFv3 070818 www.solariboost.co.uk 7
Troubleshooting Guide 2
This document provides support to installers to trace and resolve issues at the
installation stage or during service. Symptoms covered in this document are:
• Incorrectly Displays “Water Tank Hot” 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 must not 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 display will 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.

Marlec Solar iBoost+ Specifications