Daikin Enfinity - Troubleshooting Water Source Heat Pump Units

www.DaikinApplied.com 47 LARGE VERTICAL WSHP IM 1059-12
Red Flash Code 6 Missing phase
Missing phase; Lockout after
10 consecutive alerts
After 5 minutes and missing
phase condition is not present
1) Check incoming power
2) Check fuses/breakers
3) Check contactor
Red Flash Code 7 Reverse phase
Reverse phase; Lockout after
1 alert
Interrupt power to T2-T1 or
perform Modbus reset com-
mand
1) Check incoming phase
sequence
2) Check contactor
3) Check module phasing
wires A-B-C
Red Flash Code 8 Future Use N/A N/A N/A
Red Flash Code 9 Module Low Voltage
Low voltage on T2-T1
terminals*
After 5 minutes and the
voltage is back in the normal
range
1) Verify correct module p/n
2) Check VA rating of trans-
former
3) Check for blown fuse in
transformer secondary
Notes: The ash code number corresponds to the number of LED ashes, followed by a pause, and then the ash code is repeated. A lockout
condition produces a red ash, followed by a pause, a solid red, a second pause, and then repeated.
* This alert does not result in a Lockout
Troubleshooting water source heat pump units
Table 39: Troubleshooting refrigeration circuit
Symptom
Head
Pressure
Suction
Pressure
Compressor
Amp Draw
Super Heat Subcooling
Air Temp
Differential
Water (loops)
Temp Differential
Safety
Lock Out
Charge
Undercharge System (Possible Leak)
Low Low Low High Low Low Low Low Pressure
Overcharge System High High High Normal High
Normal
Normal High Pressure
Low
Low Air Flow Heating High High High
High
Low High Low High Pressure
Normal
Low Air Flow Cooling Low Low Low
Low
High High Low Low Temp
Normal
Low Water Flow Heating
Low Low
Low Low High Low High Low Temp
Normal Normal
Low Water Flow Cooling High High High High Low Low High High Pressure
High Air Flow Heating Low Low Low Low High Low Low Low Temp
High Air Flow Cooling Low High Normal High Low Low Normal High Pressure
High Water Flow Heating Normal Low Normal High Normal Normal Low High Pressure
High Water Flow Cooling Low Low Low Low High Normal Low Low Temp
TXV Restricted High Low
Normal
High High Low Low
Low
troubleshooting
CoreSense communications LED ash code information (continued)