Daikin Enfinity - Additional Troubleshooting for Size 290 Only

IM 1059-12 LARGE VERTICAL WSHP 46 www.DaikinApplied.com
troubleshooting
Table 37: 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.
Additional troubleshooting for size 290 only
IMPORTANT
The compressors in this unit are supplied with advanced
diagnostics. Should this unit fail to operate properly with solid
green lights (no faults) check the module on each compressor
and refer to the troubleshooting section in this manual.
Table 38: CoreSense™ communications LED flash code information
Status Fault Conditions Code Fault Description Code Reset Description Troubleshooting Information
Solid Green Normal Operation
Module is powered and
operation in normal
N/A N/A
Solid Red Module Malfunction Module has internal fault N/A
1) Reset module by removing
power from T2-T1
2) Replace module
Warning LED Flash
Green Flash Code 1 Loss of Communication
Module and master controller
have lost communications with
each other for more than 5
minutes
When communications are
conrmed
1) Check the control wiring
2) Verify dipswitch 8 is "ON"
Green Flash Code 2 Future Use N/A N/A N/A
Green Flash Code 3 Short Cycling
Run time of less than 1
minute; number of short cycles
exceeds 48 in 24 hours
<48 short cycles in 24 hours
1) Check system charge and
pressure control setting
2) Adjust set-point of tempera-
ture controller
3) Install anti-short cycling
control
Green Flash Code 4 Improper dipswitch 9 setting N/A N/A Verify dipswitch 9 is "OFF"
Green Flash Code 5 Future Use N/A N/A N/A
Alert Lockout LED Flash
Red Code Flash 1 Motor High Temperature
Ω > 4.5K; Lockout after 5
alerts
Ω > 2.75K and minutes
1) Check supply voltage
2) Check system charge &
superheat
3) Check contactor
Red Flash Code 2
Open/Shorted Motor
Thermistor
Ω > 220K or Ω < 40; Lockout
after 6 hours
40 < Ω < 2.75K and 30
minutes
1) Check for poor connections
at module and thermistor
fusite
2) Adjust set point of tempera-
ture controller
3) Install anti-short cycling
control
Red Flash Code 3 Short Cycling
Run time of less than 1
minute; Lockout if the number
of alerts exceeds the number
congured by the user in 24
hours
Interrupt power to T2-T1 or
perform Modbus reset com-
mand
1) Check system charge and
pressure control setting
2) Adjust set point of tempera-
ture controller
3) Install anti-short cycling
control
Red Flash Code 4 Not Used N/A N/A N/A
Red Flash Code 5 Future Use N/A N/A N/A