[Elecraft] KAT500 Fault

[Cady, Fred]

Hi Dave, 
I don't have the full context of your note but here is some information that may help:

3.9.5	Tuner Fault Conditions
The FAULT LED being lit does not mean there is an equipment failure to cause you concern.  Rather, it indicates a condition that you should correct.
A fault will occur, and the FAULT LED will light under the following conditions:
•	If the RF drive power exceeds 110 watts during a tune operation.  This can happen if your amplifier outputs more than 110 watts and the KAT500 does not interrupt the keying line while it is tuning.  You should be using a K3–KPA Cable as shown in Figure 3 4 or a separate keying line cable as shown in Figure 3 3.  Note that the KAT500 will not open the keying line if the power input to the tuner is greater than 30 watts unless you have configured it as shown in Section 3.8.
•	The VSWR of the antenna is higher than the configured Amplifier Key Interrupt VSWR Threshold and the red FAULT LED illuminates.  If this occurs, the amplifier’s keying line is interrupted.
This fault may occur frequently while the tuner is tuning and will be cleared automatically when the tuner is finished and a transmission occurs where the VSWR is about 10% lower than the threshold.  If the fault persists, press any KAT500 key, change bands, antenna or KAT500 mode, or fix the antenna problem and transmit again.  Because this fault may occur frequently, and normally, when tuning, it is not written into the fault log.
•	The impedance is outside the normal tuning range (see Table 3.1) but the KAT500 is able to match it.  In this case, you should reduce the power as needed to protect the KAT500.
To reset a fault, tap the TUNE switch or switch the power off and then on by holding the MODE switch. 

73,
Fred KE7X

Author of:
"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Portable Elecraft KX3 – Going for the Summit with the KX3 and KX3-2M/4M"
“The Elecraft KX-Line – The Complete Station”
“The Elecraft KPA500 and KAT500 – the K-Line Dream Station”
Printed, coil bound copies of these are all available at www.elecraft.com
KPA500 and KAT500 Quick Set Up Guide
http://www.ke7x.com/home/k-line-introduction-and-set-up-guide

KAT500 and KXPA500 Tuner Operation
http://www.ke7x.com/home/kat500-and-kxpa100-tuners

“The Elecraft KXPA100, PX3 and 2M/4M Transverters – Assembling the KX3-Line Station” available at www.lulu.com.

“The Elecraft K3S and P3 – Getting the Most out from Your High Performance Station”  coming very soon.
A book dedicated to the K3S upgrades for the K3 and a 3rd Edition of the K3 book are works in progress.



________________________________________
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> on behalf of dave_w0ru <dkent53 at gmail.com>
Sent: Thursday, October 1, 2015 9:32 AM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KAT500 Fault

dave_w0ru wrote
> With the
*
> KAT500
*
>  in Standby, I can tune with the KAT500 just fine.

That should read:

With the *KPA500* in Standby,

Dave w0ru



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