Dehumidifier Heater Control - Develop ineo+ 6500 Service Manual

Theory of Operation Ver1.0 Sep.2006

25.4 Dehumidifier heater control

A. Configuration
CBR/1
CBR/2
B. Operation
• The dehumidifier heater switch (SW3) supplies AC power to the sub relay (RY/2) inside the AC drive board
(ACDB).
• When the main power switch (SW1) is OFF, the RY /2 can transmit the AC power to the dehumidifier heater
(HTR) and the dehumidifier heater /1 (HTR1), dehumidifier heater /2 (HTR2) (PF only) inside the LU (option).
• Then, if SW3 is turned ON when SW1 is turned off, AC power can be supplied to HTR or HTR1/HTR2.
• When the SW1 and the sub power switch (SW2) are turned on, 24VDC is supplied to the ACDB and the
RY/2 is disconnected. Since the AC power line to the HTR and the HTR1/HTR2 is shut off with the RY /2,
the power is not supplied to the heaters even when the SW3 is turned on.
SW1
NF
SW3
RY/2
ACDB
25. OTHER CONTROLS
HTR
LU/PF(OPTION)
HTR1 HTR2
a03ut2c098ca
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