Daikin IM 986-2 VHC User Manual

Page 30 of 48 / IM 986-2
Table 8: I/O Expansion Module LED & Fault Outputs
Table 9: I/O Expansion Module Jumper Designations
Adding an I/O Expansion Module (with an interconnect
cable) to the main controller allows two-stage operation
of the Water Source Heat Pump.
I/O Expansion Module
For installation and operation information on MicroTech
III unit controller and other ancillary components, see:
• IM 927 - MicroTech III Unit Controller for Water
Source Heat Pumps (LonWorks).
The I/O Expansion Module is a eld-installed or factory
installed option. It is an extension of the MicroTech III
unit controller and provides extra functionality.
The I/O Expansion Module has 2 main purposes:
• The I/O Expansion Module has outputs to control
electric heat on a standard Water Source Heat Pump.
• The I/O Expansion Module has an independent LED
annunciator to identify operational fault conditions
on second stage equipment.
Figure 45: I/O Expansion Module Conguration Jumper
Terminals
Features
Second Circuit
• High pressure switch
• Low pressure switch
• Low suction line temperature sensor
• Compressor output
• Reversing valve
Standard Heat Pumps / Single Circuit Units
• Monitors entering water temperature for
boilerless electric heat control
• Outputs for medium and high speed fan controls.
Jumper Description Options
JP1 Number of Open for single compressor
Compressors Shorted for dual compressor
JP2
Hot Gas/ Open to disable reheat
Water Reheat Shorted to enable reheat
JP3 and JP4 open for no
supplemental heat
JP3 Supplemental JP3 open, JP4 shorted for
& JP4 Heat Type boilerless electric heat
JP3 and JP4 shorted is an
invalid setting
JP5 and JP6 open for single-speed fan
JP5 open, JP6 shorted for
JP5
Fan Speed three-speed fan
& JP6 Selection JP5 shorted and JP6 open for
two-speed fan
JP 5 and JP6 shorted is an
invalid setting
JP7
Compressor Open for single-speed compressor
Speed Type Shorted for two-speed compressor
JP8 Future Spare
1
Boilerless electric heat only
2
Alarm/fault LED indications take precedence over service test mode LED
indication. The controller shall use service test mode if the service test mode
jumper is installed, even if the LED’s indicate an alarm/fault.
Note: Mode / Faults are listed in order of priority.
Status LED's
Thermostat Alarm
Mode / Fault
Yellow Green Red
Light Output
Terminal “A”
Invalid Conguration
Flash Flash Off De-energized
Jumper Setting
Base Board
Off Flash Flash N/A
Communication Fail
High Pressure #2 Fault Off Off Flash De-energized
Low Pressure #2 Fault Off Off On De-energized
Low Suction Temp #2 Fault Flash Off Off De-energized
Sensor Failures Low Suction
Low Suction Temp #2, Flash Flash On De-energized
1
EWT (w/ Boilerless EH only)
2
Service Test Mode Enabled Flash Flash Flash De-energized
Unoccupied Mode On On Off Energized
Occupied, Bypass,
Standby, or Tenant
Off On Off Energized
Override Modes
Normal Operation Off On Off De-energized
Jumper Terminals

Daikin IM 986-2 VHC Specifications

General

Brand	Daikin
Model	IM 986-2 VHC
Category	Heat Pump
Language	English