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● Self-test
To enter the self-test function, press the SET button and ▲ button for 5 seconds and
release.
Self test steps:
1 - LED scanning
2 - Internal Fan
3 - Heating
(Heater)
4 - Cooling
(Compressor and external fan)
5 - External fan
When the self test is completed, controller will automatically exit. During self-testing, you
can press the EXT button to exit.
6. Maintenance
6.1 Trouble Shooting
The air conditioners are designed for trouble free life as long as the inlet filter is
maintained in a clean condition. To aid in service definition the service personnel can
initially identify probable cause by referring to the following trouble shooting chart.
Problem
Unit not running
Unit not cooling
sufficiently
Ice on evaporator coil
Condensate draining
continuously
Excessive vibration
3 seconds
-- seconds (running all the time)
30 seconds
60 seconds
10 seconds
Potential Cause
No Power
Fuse Blown on Control Board
Faulty Control components
Filter clogged
Blocked evaporator or
condenser coil
Evaporator or condenser fan
not operating
Loss of refrigerant or oil leaks
Insufficient heat load or unit
oversized for application
Failed evaporator fan
Enclosure not properly
sealed
Defective fan motor or wheel
Compressor loose
Service manual: TAC-12D-10
Solution
Check power source and
electrical connections
Replace with 3.15A slow blow
fuse
Replace control board
Clean or replace filter
Clean coil
Replace motor, capacitor or
entire assembly
Return to Telca or locate and
repair leak
Contact Telca
Replace evaporator fan motor
or assembly
Check and seal all openings
Replace fan sub assembly.
Tighten mounting bolts
8/9
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