Configuration - Johnson Aurum R290 M Serie Guide D'utilisation

9 CONFIGURATION

The unit should be configured by an authorized installer to match the installation environment (outdoor climate,
installed options, etc.) and meet the user demand.
Follow the instructions below for the next step.
9.1 Check before configuration
Before powering on the unit, check the following items:
Field wiring: make sure all wiring connections observe the instructions mentioned in the
INSTALLATION, OPERATION AND MAINTENANCE MANUAL.
Fuses, circuit breakers, or protection devices: check the size and type according to the instructions
mentioned in the INSTALLATION, OPERATION AND MAINTENANCE MANUAL. Make sure that no
fuses or protection devices have been bypassed.
Backup heater's circuit breaker: ensure the backup heater's circuit breaker in the switch box is closed
(It varies with the backup heater type). Refer to the wiring diagram.
Booster heater's circuit breaker: ensure the booster heater's circuit breaker is closed (applicable only
to units with an optional domestic hot water tank).
Internal wiring: check the wiring and connections inside the switch box for loose or damaged parts,
including earth wiring.
Mounting: check and ensure that the unit and the water loop system are properly mounted to avoid
water leakage, abnormal noises and vibrations during the unit startup.
Damaged equipment: check the components and piping inside the unit for any damage or deformation.
Refrigerant leak: check the inside of the unit for any refrigerant leakage. In case of refrigerant leakage,
follow the relevant content in the "Safety Precautions".
Power supply voltage: check the voltage of the power supply. The voltage must be consistent with the
voltage on the identification label of the unit.
Air vent valve: make sure the air vent valve is open (at least 2 turns).
Shut-off valve: make sure that the shut-off valve is fully open.
Sheet metal: make sure all the sheet metal of the unit is mounted properly.
Water volume: make sure the water volume in the system is within the limitation.
Strainer: make sure the strainer is mounted properly and clean.
After powering on the unit, check the following items:
Upon power-on of the unit, nothing is displayed on the wired controller:
Check the following abnormalities before diagnosing possible error codes.
- Wiring connection issue (power supply or communication signal).
- Fuse failure on PCB.
Error code "E8" or "E0" is displayed on the wired controller:
- Residual air exists in the system.
- The water level in the system is insufficient.
Before starting test run, make sure that the water system and the tank are filled with water, and air is
removed. Otherwise, the pump or backup heater (optional) may be damaged.
Error code "E2" is displayed on the wired controller:
- Check the wiring between the wired controller and the unit.
Initial start-up at low outdoor ambient temperature:
To start the initial start-up in low outdoor ambient temperature, the water has to be heated gradually.
Please use the preheating for floor function. (Refer to "SPECIAL FUNCTION" in FOR SERVICEMAN
mode)
For underfloor heating application, floor could be damaged if the temperature rises
sharply in a short time.
Please ask the building construction contractor for further information.
More error codes and failure causes can be found in the INSTALLATION, OPERATION AND MAINTENANCE
MANUAL.
NOTE
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