6:2 (2), 0-004-7614-0 (GB) TAC AB, 1998-10-23
TAC 2413 Handbook Troubleshooting
Problem Check that...
The temperature in the • the AHU is in timed operation and
ventilation system is too high no holiday program is active
• an alarm has not stopped
the AHU
• high current protectors and
power switches are on
• the heating valve is controlled,
but if the cooling is active, that
it is completely closed
• heat recovery is active, but if
the cooling is active, that cooling
recovery is active
• the cooling valve is controlled
• the cooling media temperature
is correct
• the cooling compressor/
the DX step is correctly
installed
The calculated setpoint does • setpoints and their maximum and
not appear to be correct minimum limits are correct
• the setting of any possible
outdoor compensation is correct
• any possible SPC effect at 2
and 10 V is set correctly
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