ESIE13-02
Troubleshooting
55
Part 4 – Troubleshooting
4
3
4
5
4
1.2
Overview of General Problems
General guidelines
Before starting the troubleshooting procedure, carry out a thorough visual inspection of the unit and
look for obvious defects such as loose connections or defective wiring.
Before contacting your local Daikin dealer, read this chapter carefully, it will save you time and money.
Warning! When carrying out an inspection on the switch box of the unit, always make sure that the
main switch of the unit is switched off.
When a safety device was activated, stop the unit and find out why the safety device was activated
before resetting it. Under no circumstances safety devices may be bridged or changed to a value other
than the factory setting. If the cause of the problem cannot be found, call your local Daikin dealer.
If the pressure relief valve is not working correctly and is to be replaced, always reconnect the flexible
hose attached to the pressure relief valve, to avoid water dripping out of the unit!
General symptoms
Error codes
When a safety device is activated, the user interface will display the
t
-icon on the home screen. When
pushing the
t
-button, the error code and a brief description of the error will be shown.
A short list of all errors and corrective actions can be found in the installer reference guide. More
detailed information on how to solve these errors can be found in the next pages.
Equipment Condition
Remedy
1.2.1
Equipment does not Operate
See page 56
1.2.2
Indoor Pump Operates, but Compressor does not
See page 57
1.2.3
Cooling/Heating Operation Starts but Stops Immediately
See page 59
1.2.4
After Unit Shuts Down, It cannot be Restarted for a While
See page 61
1.2.5
Equipment Produces Loud Noise or Shakes
See page 63
1.2.6
User Interface Displays “Busy”
See page 65
1.2.7
The Unit is Turned on (d LED is lit) but the Unit is not Heating
or Cooling as Expected
See page 66
1.2.8
The Unit is Turned on but the Compressor is not Starting
(Space Heating or Domestic Heating)
See page 67
1.2.9
Pump is Making Noise (Cavitation)
See page 68
1.2.10
The Water Pressure Relief Valve Opens
See page 69
1.2.11
The Water Pressure Relief Valve Leaks
See page 70
1.2.12
The User Interface Does Not Display Certain Screens (RT,
LWT, Tank, Ext RT)
See page 71
1.2.13
Domestic Hot Water Capacity Shortage at Low Outdoor Tem-
peratures
See page 72
1.2.14
Space Heating Capacity Shortage at Low Outdoor Tempera-
tures
See page 73
1.2.15
Room Temperature Set Point Isn’t Reached or Increases Too
Slow
See page 74
