Rampmaster Operating Manual
Heat Treat ver. RM3 – Feb 2017
Page 22 of 25
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Oven Trouble Shooting
Listed below are some of the more probable oven problems you’ll encounter along with their most common cause and repair advice. Please feel free to
contact Evenheat for assistance when dealing with these and other potential problems.
No Display
Check to see that the oven is actually plugged in. It happens! Also check the circuit protection (breakers or fuses) to see that they are not tripped or open.
Breakers and fuses don’t trip or open for no reason. They indicate a fault which should be investigated by licensed personnel. See below.
Oven Won’t Reach Temperature
Error Codes associated with a oven not reaching temperature are E– 1, E– 3, E– 5 and E– 8. A few possibilities here:
A low voltage will certainly slow an oven down and, if the drop is low enough, it may cause failure to reach temperature. You can test this using the VOLT
test described on page 19. This test is best performed at the time of trouble. Low voltage is generally associated with your power service or provider and is
rarely a fault in the oven.
A failed element reduces the heat produced. Failed elements tend to be very visual and are easily seen. With the oven off (not running and unplugged)
have a look at the elements for any breaks. If you see no breaks in the heating element then suspect a relay problem.
A failed relay (fails to close) reduces the heat produced. While a relay failure acts like an element failure, a relay is not visible. If the heating elements
appear to be intact replace the relay.
Oven Won’t Shut Off
Error Codes associated with a oven not shutting off are E– 2 or E-4 or E– d.
Most likely a failed relay (failed closed). A failed relay may cause the oven temperature to increase when it should be decreasing. Depending upon your
particular oven model you may see up to 2 relays used in its design. Identifying the failed relay is fairly simple as the element connected to it will remain
on. Unplug the oven and remove the oven control panel. Simply follow the element leads to the relay to identify it. Relays are maintenance items and we
recommend replacing all of them when needing to replace one.
Check your program. While you won’t see the error codes if you’ve programmed incorrectly this problem is possible.
Fail is Displayed
The thermocouple (temperature sensor) circuit is faulty. The thermocouple circuit is broken at some point, usually the thermocouple itself. The
thermocouple circuit consists of the thermocouple, any connecting blocks and the thermocouple lead wire connecting to the Rampmaster.
Circuit Protection Opens (“Blown” Breaker or Fuse)
Circuit protection can open for various reasons. The BIG TWO are a short circuit and overheating. We’ll look at each separately.
Short circuits occur when line voltage finds it’s way to another line or ground. They are usually violent occurrences with lots of noise, flashes of light and
maybe a bit of smoke! During a short circuit the amperage goes very high. This increase in amperage exceeds your breaker/fuse rating which causes them
to open (“blow”). That’s exactly why they’re there. Short circuits generally happen immediately upon plugging the oven in or running a program. They
generally do NOT happen after the oven has been on for some time.
Overheating of the breakers/fuses can cause them to open (“blow”). Overheating needs time to happen. If the oven is running fine for a while and then
the breakers or the fuses open we can be fairly confident that the problem is overheating and not a short circuit. Overheating reduces the amount of
amperage a breaker/fuse will allow to pass before it opens. Overheating is caused by many factors, the most common are: loose wire connections at the
breakers/fuses, the size of the wire “feeding” the oven is too small, the electrical receptacle is faulty or breaker/fuse is faulty.
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