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OM 1239

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I/O expansion module faults and fan operating modes

Table 13: I/O expansion module LED & fault outputs

Description

Type

Yellow

Green

Red

Baseboard Communication Fail

Fault

Flash

OFF

Flash

Compressor #2 High Pressure (HP2)

Fault

OFF

Flash

Compressor #2 Low Pressure (LP2)

Fault

OFF

Compressor #2 Low Suction Temp (LT2) Sensor Fail

Fault

Flash

Compressor #2 Low Suction Temp (LT2)

Fault

Flash

OFF

Entering Water Temp Sensor Fail (with Boilerless Electric Heat and Waterside Economizer)

Fault

OFF

Flash

Low Entering Water Temperature (No Display with Boilerless Electric Heat)

Fault

OFF

Flash

Fan is OFF

Mode

OFF

Fan is ON

Mode

OFF

Flash

OFF

Note: Mode / Faults are listed in order of priority.

Содержание MicroTech III

Страница 1: ...MicroTech III Unit Controller with I O Expansion Module for Two Compressor Water Source Heat Pumps Large Capacity Vertical Models LVC Standard Range LVW Extended Range Large Capacity Horizontal Models...

Страница 2: ...nd LED annunciation 14 A and IV PR H8 16 Fault recovery and reset 17 Fan operation during most modes faults and shutdowns 19 Faults and modes 19 Microtech III unit controller interface to external equ...

Страница 3: ...nication module Each option features direct quick connect wiring to all unit controlled components for clean wiring inside the control box Each control circuit board receives power from a 75VA transfo...

Страница 4: ...ubleshooting and diagnosis of the second circuit Allows for Control of second refrigeration circuit LonWorks Communication Module The MicroTech III control system accepts a plug in LonWorks commu nica...

Страница 5: ...rsing Valve Common H6 7 Reversing Valve Output H7 1 1 No Connection H7 2 No Connection H7 3 Red LED Output H7 4 Green LED Output H7 5 Yellow LED Output H7 6 Red Green Yellow LED Common H8 1 1 Isolatio...

Страница 6: ...OM 1239 6 www DaikinApplied com MicroTech III Unit Controller Figure 1 MicroTech III unit controller terminal locations...

Страница 7: ...Economizer Output N O H3 4 Ext 24 VAC Common H3 5 Fan Motor Signal H3 6 Fan Motor Common H4 1 1 Entering Water Temp Sensor Signal H4 2 Entering Water Temp Sensor Common H5 1 1 No Connection H5 2 No Co...

Страница 8: ...PI_SELECT1_0 SPI Select To Communications Board CN_SPI 4 SPI_CLK_0 Master Clock CN_SPI 5 SPI_RX_0 MOSI CN_SPI 6 SPI_TX_0 MISO CN_SPI 7 SREADY_0 SPI Ready To Baseboard CN_SPI 8 No Connection TB1 1 TB1...

Страница 9: ...re cycling power to the controller or sending a controller a reboot command through the network communications Table 6 MicroTech III controller configuration jumper settings Baseboard Description Jump...

Страница 10: ...Open Secondary Heating Options JP3 JP4 JP3 Open None JP4 Open JP3 Shorted Supplemental Electric Heat JP4 Open JP3 Open Boilerless Electric Heat JP4 Shorted Cooling Dehumidification Options JP5 JP6 JP...

Страница 11: ...hru activation of the G terminal by the thermostat fan switch on On a further demand for cooling stage 2 the 1st compressor will start in the cooling mode On a further demand for cooling the second co...

Страница 12: ...annunciation capabilities Standby mode BACnet or LonWorks units can receive a signal from the Building Automation System BAS to initiate the energy savings mode This mode is typically initiated by the...

Страница 13: ...no anti freeze in the cooling heating modes and extended range applications in the cooling mode or 13 5 F LWT on extended range applications in the heating mode those with anti freeze Defrost process...

Страница 14: ...r will energize in place of the failed lead compressor when the lag compressor minimum OFF timer has expired Reversing valve for the lag compressor will be positioned if necessary 5 seconds after the...

Страница 15: ...condensate overflow mode See Table 10 on page 19 When the unit senses a condensate overflow fault while in cooling mode the following occurs The compressors de energize The fault terminal A energizes...

Страница 16: ...rmal operation When the E terminal is no longer grounded the unit will automatically return to normal operation Note The remote shutdown input E will suspend unit operation Disconnect power when servi...

Страница 17: ...clears faults the first two times they occur within a 24 hour period and triggers an automatic lockout on the 3rd fault The fault remains active until the alarm is manually cleared At the end of the...

Страница 18: ...terminal wiring Refer to MicroTech III unit controller and I O expansion module connector terminal tables and descriptions on page 5 MicroTech III unit controller terminal locations on page 6 3 The le...

Страница 19: ...is left on after system check out the unit may be damaged Table 9 Room sensor status LED LED On Time Sec LED Off Time Sec Operating Mode 0 5 0 5 Alarm Condition or Network Wink Operation Active 0 0 Co...

Страница 20: ...FF ON Compressor 1 Suction Temp Sensor Fail Fault Flash Flash ON Freeze Fault Detect Fault Flash OFF Flash Compressor 1 Low Suction Temp Fault Flash OFF OFF Room Temp Sensor Fail Room Sensor Control O...

Страница 21: ...ostat or control inputs To interface triacs or other solid state switching devices to the MicroTech III unit controller inputs separate them from the board using mechanical relays To do this use the t...

Страница 22: ...OFF OFF Flash Compressor 2 Low Pressure LP2 Fault OFF OFF ON Compressor 2 Low Suction Temp LT2 Sensor Fail Fault Flash Flash ON Compressor 2 Low Suction Temp LT2 Fault Flash OFF OFF Entering Water Te...

Страница 23: ...is needed the humidistat can be wired to TB1 1 on the Microtech III unit controller allowing the WSHP unit to operate in dehumidification mode only The unit will only respond to a call for dehumidific...

Страница 24: ...DC Signal Common Fan Speed Se lect Fan Coil Version Only Emergency Shutdown Unoccupied Dehumidifica tion Sensor Digitally Adjustable Room Temperature Sensor Part No 910121754 Figure 13 MicroTech III b...

Страница 25: ...d return air discharge air and leaving water temperature sensor Wall mounted temperature sensors include setpoint adjustment and tenant override The user has the capability of substituting the wall se...

Страница 26: ...Four green status LEDs on the communication module indicate communication activity on the MS TP communication network and with the unit controller Figure 15 MicroTech III BACnet MS TP snap in communic...

Страница 27: ...4V NO 24VAC COMMON 24V NC Note Switch L2 L3 fan motor wires for left hand unit Legend Item Description CC1 Circuit 1 Compressor Contactor CC2 Circuit 2 Compressor Contactor CM1 Circuit 1 Compressor CM...

Страница 28: ...OOL 2 W1 HEAT 1 W2 HEAT 2 A ALARM OUTPUT 5 DC SIGNAL COM 4 ROOM SENSOR TO 3 SETPOINT ADJUST 2 FAN MODE HT CL AUTO 1 ROOM SENSOR LED U MARK IV OCC UNOCC E EMER SHTDN INPUT R 24VAC Communication Module...

Страница 29: ...Switch L2 L3 fan motor wires for left hand unit Note Wiring diagrams are typical For the latest drawing version refer to the wiring diagram located on the inside of the controls access panel of the un...

Страница 30: ...HTDN INPUT R 24VAC Communication Module MicroTech III Controller 24V NO 24VAC COMMON 24V NC Note Switch L2 L3 fan motor wires for left hand unit Note Wiring diagrams are typical For the latest drawing...

Страница 31: ...oose connection Check for faulty compressor capacitor Insufficient cooling or heating Check for lock rotor amp draw Check for defective compressor internal windings with ohm meter Check for proper air...

Страница 32: ...t to its standard terms and conditions of sale including Limited Product Warranty Consult your local Daikin Applied Representative for warranty details To find your local Daikin Applied Representative...

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