07/30/2019
11
EI917
Troubleshooting
1.
This product contains several interference suppression components, but as an electronic logic
product unpredictable and unusual transients or interferences may sometimes cause strange
results. If this product is acting strange, turn off the source power, count to 10, and reenergize.
2.
Terminal blocks are clamp-down type. If there is no wire connected and the screw is loose, the
screw may not necessarily make a good electrical contact to the inside components. Example – if
you are jumpering the thermostat terminals without thermostat wire connection or if you are
attempting to measure voltage on a screw head, you may get erroneous or unpredictable results if
the screw is not tightened down.
Outlet Temperature Sensor
See previous page relating to LED indication and bad sensor operation.
The green LED is an indication that the micro program cannot read a temperature value. This sensor test
or indication does not determine a bad temperature reading, it simply indicates there is software
communication to the sensor itself.
Temperature Sensor Detail
Red wire to J2-1 +5VDC or RED
Black wire to J2-2 DATA or BLK
White wire to J2-3 COM or WHT
Air Filter
A dirty filter can lead to poor system performance and eventual hi-limiting. It is suggested to wash filter
at least twice per year. See
Routine Maintenance
for instruction on how to wash the filter.
Control Fuse
The low voltage source fuse is a 2A fast blow. A spare fuse is included (next to the operating fuse).
Routine Maintenance
Filter –
this unit includes an air filter which is a permanent and washable filter.
Suggest at least twice per year removing filter and using standard household water to back flush collected
dust/debris.
Remove screws from small door, opposite the hinged door end
Filter is simply held within channels
Replacement Parts
Part Number
Description
4341
BLOWER SPEED CONTROL 120V
5541
TRANSFORMER 120/240:24 40VA CHNN
WFCD25605
PCB ASSEMBLY WF 2 STAGE DUCT SENSOR MODE DIAL
UFUSE0440
FUSE 2A 250V GLASS FAST ACT
VLUG5527
LUG 2 POLE 4-14AWG 4-.250 QUICK CONNECT