Page 35
SYMPTOM
CAUSE and SOLUTION
Lo is continually
displayed
−
Temperature is below minimum (13.5
°
F
or -10.0
°
C).
−
Probe is disconnected or defective.
Hi is continually
displayed
−
Temperature is above maximum
(105.0°F or 41°C).
−
Probe is short circuited.
F2 is continually
displayed at the
relative humidity
−
Humidity read by the probe is lower
than the minimum (30%).
−
Probe is unplugged or defective.
Mist output is
not functioning
−
Make sure LED 1 or 2 is illuminated. If
the LED is flashing, the mist output is
in the timer’s idle time. If the LED is
continuously activated and mist output
is not activated, check output wiring
and fuse. Refer to figure 4 for fuse lo-
cation. If a fuse is burnt, replace by
one of the same type.
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.
TROUBLESHOOTING
APPENDIX
Summary of Contents for MST-2B
Page 8: ...Page 8 MST 2B...
Page 38: ...Page 38 MST 2B...
