Mertik Maxitrol G30 - ZRHT Remote Control Repair
Job Timeline (Ref 4804-5630)
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Mertik Maxitrol G30 - ZRHT Remote Repair Details
Manufacturer
Mertik Maxitrol
Model
G30 - ZRHT
Customer's Fault Description
In manual mode the Up Button signal from the remote is correctly lighting the receiver's LED and increasing output from the fire's gas valve.
However the output from the fire cannot be reduced as the Down Button activation is not being seen by the receiver during normal manual operation.
Please note that a poor but very intermittent signal appears to be registering on the receiver's LED but only achieved by pressing and holding the Down Button whilst waving the remote very close to the receiver module.
When this intermittent signal is detected the receiver does reduce the output from the gas valve.
I did fit new batteries in both the remote hand set and receiver modules to eliminate this possibility.
Using a multi-meter I also checked that both the up and down buttons of the remote handset are functioning correctly.
I believe that there is a known common fault on a crystal controlling the down channel of these receiver modules. (I refer to your previous job timeline 1068-1289).
Of course, any of the fire's auto temperature control functions will also not work correctly with this ongoing receiver fault.
This fireplace control and receiver arrived safely and on testing was confirmed to have a faulty down channel.
This was due to a faulty 40khz oscillator in the receiver, this was replaced which restored full functionality.
The remote was found to be working as per normal.
Remote Images
The above images show the actual remote control sent to us by the customer for professional repair services.