Daikin Enfinity CCH - I;O Expansion Module LED Faults

troubleshooting
MicroTech III Unit Controller LED Faults (Continued)
Table 18: Serial EEPROM Corrupted
Description Type Yellow Green Red
Serial EEPROM Corrupted Fault ON ON ON
• Cycle power to see if problem is corrected
• Replace main board, only if problem persists after power cycle
Table 19: Service Test Mode Enabled
Description Type Yellow Green Red
Service Test Mode Enabled Mode Flash Flash Flash
• Jumper JP1 is shorted for service test mode operation. Note: Used only for testing purposes, control timing may damage actual hardware
Table 20: Unoccupied Mode
Description Type Yellow Green Red
Unoccupied Mode Mode ON ON OFF
• Terminal U on main control board is connected to common from external source, or the network is overriding occupancy mode
Table 21: Occupied, Bypass Mode, Standby or Tenant Override Modes
Description Type Yellow Green Red
Occupied, Bypass Mode, Standby or
Tenant Override Modes
Mode OFF ON OFF
• Unit is operating normal. It may currently have a control signal or ready to operate when a control signal is active
I/O Expansion Module LED Faults (For units with optional boilerless
electric heat)
Table 22: Invalid Jumper Configuration
Description Type Yellow Green Red
InvalidJumperConguration Fault Flash Flash OFF
• Verify jumper settings
Table 23: Baseboard Communication Fail
Description Type Yellow Green Red
Baseboard Communication Fail Fault OFF Flash Flash
• Verify connection of cable between H5 on main board and H1 on I/O expansion board
Table 24: Entering Water Temp Sensor Fail (Boilerless Electric Heat or Waterside Economizer Only)
Description Type Yellow Green Red
Entering Water Temp Sensor Fail
(Boilerless Electric Heat or Waterside
Economizer Only)
Fault Flash Flash ON
• Verify connections at terminals H4 on the I/O expansion board
• Verify resistance of EWT thermistor is 10K @ 77°F
Table 25: Low Entering Water Temperature (No Display On Boilerless Electric Heat)
Description Type Yellow Green Red
Low Entering Water Temperature (No
Display On Boilerless Electric Heat)
Fault OFF ON Flash
• Verify entering water temperature is greater than set point
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