15
Installation Manual
Tr
oubleshooting and how to maintain
Reference
①
The items marked should be cleaned and checked by a trained installer
in accordance with the installation manual.
Troubleshooting
Periodic Checklist
What to check
Annually
Every 6 months
Indoor Unit
Outdoor Unit
Domestic Hot
Water Tank
Indoor Unit
Surface cleaning of the outdoor unit
●
Cleaning of the BPHE on the water side in the indoor unit
①
●
Removal of dust on electric parts using compressed air
①
●
●
●
Fastening status of electric wire connections
①
●
●
●
Cleaning of outdoor fan
①
●
●
●
Fastening status between the outdoor fan and the motor
①
●
●
●
Cleaning of the strainer on the water inlet side
①
●
●
Water flow rate
①
●
Leakage on the water pipe and thermal storage tank
connections
●
●
Water quality
①
●
Refilling of anticorrosive agent
①
●
Case
What to check
Handling
When the product
does not work
● Is the circuit breaker activated, or the fuse out?
● Check the circuit breaker or replace the fuse.
● Are you experiencing a blackout situation?
● Start the product when the power is restored.
● Has an "Er" sign on the room temperature
display, or "##" sign on the domestic hot water
tank display been displayed for more than 1
hour?
● Contact the authorized service center.
● Is the voltage too low?
● Check the voltage specifications.
When the heating is
insufficient
● Is the temperature set appropriately?
● Adjust settings again where necessary.
● Is there any window or door that is open?
● Close the window or door.
● Is the outdoor unit blocked or clogged?
● Remove obstacles.
When the product
stops during
operation
● Has an "Er" sign on the room temperature
display, or "##" sign on the domestic hot water
tank display been displayed for more than 1
hour?
● Contact the authorized service center.
※
If your problem persists even after you have taken action in accordance with the aforementioned instructions,
please contact your dealer or authorized service center.
※
Carrier's products feature state-of-the-art AI (artificial intelligence). In the event of an error in the product, the “Er” or “##” sign
appears repeatedly on the temperature display, and the product performs self-diagnosis and restarts automatically. If the
error code is displayed continuously for more than 1 hour, please contact the authorized service center.