Page 48
ECS 5M
SYMPTOM CAUSE and REMEDY
Lo is
continually
displayed
− Temperature is below minimum
(13.5°F or -10.0°C).
Hi is
continually
displayed
− Temperature is above maximum
(105.0°F or 41°C).
−
Probe is short circuited.
Fan(s) or
heater not
operating
− Verify whether the fan LED is on. If
LED is on yet fan or heater is not
operating, verify wiring, fan and fuse.
Refer Figure 6 for fuse location. If fuse
is blown, replace with fuse of same
type.
Stage 5 Fan
or Heater is
operating
erratically
−
Verify that the software setting switch
located at the rear of the faceplate is
properly set.
−
Verify the minimum rating (10mA at
230V or 20mA at 230V.
Display is
blank
−
Verify that the line voltage selector
switch is properly set.
− Verify that the 10 pin flat cable
between the main board and the
faceplate board is connected.
F2 displayed
for relative
humidity
− Humidity is below minimum (30%).
−
Probe is disconnected or defective.
TROUBLESHOOTING
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