EMI S1C, WLHA manual Troubleshooting, EMI Air handlers with Unit Mount Infrared Controls

MAINTENANCE and Troubleshooting procedure

MAINTENANCE

4. Vacuum dust from the return air grille and	5. The unit may be wiped with a damp cloth
coil surface when cleaning the filter.	when needed.

Note: Do not run the unit without the filter or the grille.

Troubleshooting

EMI Air handlers with

Unit Mount Infrared Controls

! Warning !

All service should be performed by a qualified service technician. Before removing access panels or control covers to expose moving parts of non-insulated live electrical compo- nents for service, disconnect all high volt power supplies to both the indoor unit and outdoor unit. Failure to do so could result in physical injury and/or electrical shock.

When trouble-shooting the indoor unit, please refer to the wiring diagram that is supplied with the equipment. It is located on the inside surface of the left end cap. (Also refer to Locate Electrical Wiring section in the front of this instruction.) If you are unable to locate the wiring diagram please feel free to call the factory technical service line at (800) 228-9364 and one can be faxed or mailed. Please have the full model and serial number available prior to calling.

EMI America Series evaporators are designed to operate with EMI America Series condensers. The evaporator (indoor unit) and condenser (outdoor unit) are to be

independently connected to the electrical service panel and protected by separate time delay fuse or HACR breakers. (See the unit name plate for the correct breaker type and size). The indoor and outdoor units are also connected to each other via a 24V inter- connect wiring. a transformer provides the low volt power source for the controls. The number of low volt interconnect conductors will be two to six depending on heating op- tions and or thermostat selection. Intercon- nect wire should be at least 18 awg. Refer to the unit wiring diagram for the interconnect diagram that matches your system.

Figure 1A

Not used

WLCA/WLHA High Wall Evaporator 29 www.enviromaster.com