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MRF 16/22
B.
Furnace overheats
1.
The HEAT light
goes OFF with
the instrument
switch
2.
The HEAT light
does not go off
with the
instrument switch
and the fault
persists when a
5A control fuse is
removed from its
fuse-holder
C.
Microwave faults
For any microwave faults, contact Carbolite at the address given at the back of this manual.
15 Environment
The furnace contains electrical parts and should be stored and used indoors in conditions
as follows:
Temperature:
Relative humidity:
Altitude:
Electrical supply:
Overvoltage:
Pollution:
16 Specification
Radiant
Max
Max
Heating
Temp
Power
Power
°C
kW
kW
1600
12
9
50
The controller shows a
very high temperature
The controller shows a
low temperature
The power thyristor has
failed "ON"
5°C - 40°C
maximum 80% up to 31°C decreasing linearly to 50% at 40°C
not exceeding 2000m
fluctuation not exceeding 10%
category II IEC60364-4-443
degree 2
Micro
Micro
Case Size (mm)
Power
Freq'y
kW
MHz
H
2
2450 1090 910
The controller is faulty
The thermocouple may have been
shorted out or may have been moved
out of the furnace
The thermocouple may be mounted
the wrong way round
The controller may be faulty
Check for an accidental wiring fault
which could have overloaded the
thyristor.
Isolate the furnace if this fault
persists.
Chamber Size
(mm)
W
D
H
W
830 +
232 245 396
95(door)
Max
Volume
Distributed
Load
Litres
kg
D
7.5
22
MF 55-GB 1.21
Net
Weight
kg
290
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