Specifications

Munters Corporation
DFT
SAE
DATE
12/12/07
DWG NO.
K70203
Dehumidification Division
CHK
CAG
12/12/07
CUST NAME:
HCD1125 thru 9000-SA / ICA-0500
thru 1500 (STANDARD)
79 Monroe Street
Amesbury, MA 01913
APP
CAG 12/12/07
PAGE
3 OF
8
REV
2
4.0 FAULTS & WARNINGS
ESC or Help button may be pressed twice quickly to exit back to the system screen at any time during screen navigation.
4.1 Alarm Indication
4.1.1 Fault and warning indication is seen in two possible manners on the equipment’s control enclosure. The HMI
display and fault warning lights. The HMI will display the blinking triangle with exclamation point and the fault
message on the Alarm screen (figure 1.4).
4.1.2 A fault results in the Red Light (LT02) remaining illuminated constantly.
4.2 List of System and DH Faults
4.2.1 FAULT - D/H WHEEL MOTOR FAULT
4.2.1.1 If the desiccant drive motor starter/protector (MSP1) trips the system is faulted.
4.2.1.2 The system will go into the shutdown sequence as described in Section 4.0, and the system auxiliary
dry contacts close in sequence (described in Section 2.0), also process blower will purge.
4.2.1.3 The dehumidifier will be held in the 'Fault' condition by (PLC1). To restart the dehumidifier clear the
alarm pressing the acknowledge ACK on the HMI, reset the overload, and go to the ALARM screen
and press the F4 RESET key this resets the PLC. To restart the system, the selector switch (SS01)
must be moved to the “OFF” position, then move (SS01) back to the “AUTO” or “MANUAL” position.
4.2.2 FAULT - REACTIVATION MOTOR FAULT
4.2.2.1 If the reactivation blower motor starter/protector (MSP2) trips the system is faulted.
4.2.2.2 The dehumidifier goes into the shutdown sequence, as described in Section 4.0, and the system
auxiliary dry contacts sequence as described in Section 2.0 The dehumidifier will be held in the 'Fault'
condition by (PLC1). To restart the dehumidifier clear the alarm pressing the acknowledge
ACK on the HMI, reset the overload, and go to the ALARM screen and press the F4 RESET key this
resets the PLC. To restart the system, the selector switch (SS01) must be moved to the “OFF”
position, then move (SS01) back to the “AUTO” or “MANUAL” position.
4.2.3 FAULT - SUPPLY BLOWER MOTOR FAULT
4.2.3.1 If the supply blower motor starter/protector (MSP3) trips or the customer-supplied variable frequency
drive (VFD) goes into a Fault, the system is faulted.
4.2.3.2 The system will go into the shutdown sequence (described in Section 4.0), and the system auxiliary
dry contacts close in sequence (described in Section 2.0).
4.2.3.3 The dehumidifier will be held in the 'Fault' condition by (PLC1). To restart the dehumidifier clear the
alarm pressing the acknowledge ACK on the HMI, reset the overload, and go to the ALARM screen
and press the F4 RESET key this resets the PLC. To restart the system, the selector switch (SS01)
must be moved to the “OFF” position, then move (SS01) back to the “AUTO” or “MANUAL” position.
4.2.4 FAULT - DEHUMIDIFIER WHEEL ROTATION
4.2.4.1 Limit switch (LS01) is wired normally closed, and is located inside the dehumidifier wheel
compartment next to desiccant wheel. As the wheel turns, a cam fastened to the wheel housing
opens this limit switch.