Routine Maintenance - Electro Industries EM-MC00 Series Installation & Operating Manual

Troubleshooting
The blower is not turning on
The blower runs in "high
speed" only
The blower runs in "MED
speed" only
The blower runs in "LOW
speed" only
Condensation or frost build-
up on cabinet or ductwork
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.
 Open small door
 Filter is simply held within channels
07/29/2019
 Check unit display. Display should show "FAN OFF" or
temperature screen.

If screen is blank, check 2A fuse.
 If screen displays the "FAN OFF" screen, unit is not being told to
turn on.

Verify field low voltage wiring is correct
o CT or R & W
 If screen displays the temperature and blower is not on, check for
power to the blower motor.

If power present, verify switch R & W IN only closure
between circuit board T18 and T19 (must be active call).

If no switch closure between T18 and T19, replace circuit
board.

If power present and switch closure detected, replace
blower.

If power is not present, check high voltage wiring.
 If using the "R & W" terminals (option 1), high speed blower is the
only option.
 If using CTs, ensure correct wiring of CTs, make sure high speed
blower CT only connects to the CT terminal block (TB2) "HI"
input.
 If using "Multi-Spd Setup" option, verify external exhaust blower
motor is not running high speed, once verified, it is suggested you
run through the "Multi-Spd Setup" again to verify correct
programming (see Basic Setup & Configuration section).
 If using CTs to turn this product on, ensure correct wiring of CTs,
make sure MED speed blower CT only connects to the CT
terminal block (TB2) "MED" input.
 If using "Multi-SPD Setup" option, verify external exhaust blower
motor is not running medium speed, once verified, it is suggested
you run through the "Multi-Spd Setup" again to verify correct
programming (see Basic Setup & Configuration section).

If using CTs to turn this product on, ensure correct wiring of CTs,
make sure LOW speed blower CT only connects to the CT
terminal block (TB2) "LO" input.
 If using "Multi-Spd Setup" option, verify external exhaust blower
motor is not running low speed, once verified, it is suggested you
run through the "Multi-Spd Setup" again to verify correct
programming (see Basic Setup & Configuration section).
 Insulate sections of cabinet and ductwork.

Routine Maintenance

25
Solution
EI915