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Installation Manual
Test operation after
installation
Precautions for test operation
You must check whether the water during test operation flows in the product seamlessly.
(If water flow in the water piping is not sufficient, do not operate the product.)
Caution
Item
Symptom
Cause
Check and measure
Water flow
status
Er 62
Water does
not flow, or the
water flow is
not sufficient
Check whether the Domestic Hot Water Pump is working.
Check whether the water piping system is clogged.
(strainer cleaning, valve closing, valve disorder, air in the
water piping, etc.)
Check for abnormality of the water flow switch.
(water flow switch failure, arbitrary modification,
disconnection, etc.)
Verification of water flow into the indoor unit
Guide for users
● After installation and test are completed, provide a detailed explanation about the major
operating mode of the boiler to the user.
(turning the product on and off, functions of the remote controller)
● Verify and check whether air has completely vented, whether supply water flows
seamlessly, whether the temperature difference between the entering water and leaving
water is appropriate and whether the flow switch operates normally.
● Verify whether there is any refrigerant leakage and disconnected or loosely fastened
communication or power cable, and check the wire connection status using an electrical
wiring diagram.
● Check whether the night electricity timer is set to 22:00 when the night power service is
initiated (in case of using night electricity in Korea).
● Check whether the power cable and the communication cable are connected.
- Check whether the power cable is connected accurately according to the correct
sequence.
- Check whether the insulation resistance measured between the power supply terminal
block and a ground with DC mega tester (DC 500V) is 2.0 MΩ or higher.
- Do not operate the product if the reading is below 2.0MΩ.