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Trial Operation and Testing
1.
Trial operation and testing
•
Select the lowest programmable temperature.
•
For protection, the system disables restart operation for 3 minutes after it is turned off.
•
During the trial operation, fi rst check the operation of each unit individually. Then also check the simultaneous operation
of all indoor units.
•
After running the unit for approximately 20 minutes, measure the temperatures at the indoor unit inlet and outlet. If the
measurements are above the values shown in the table below, then they are normal.
Temperature difference between inlet and outlet
•
During cooling operation, frost may form on the gas stop valve or other parts. This is normal.
•
Operate the indoor units in accordance with the included operation manual. Check that they operate normally.
2.
Items to check
Are the indoor units installed securely?
Has an inspection been made to check for gas leakage?
Has complete thermal insulation been done (gas pipes, liquid
pipes, indoor portions of the drain hose extension)?
Is the drainage secure?
Are the ground wire connections secure?
Are the electric wires connected correctly?
Is the wiring in accordance with the specifi cations?
Are the inlets/outlets of the indoor and outdoor units free of
any obstructions?
Are the stop valves open?
•
Indoor unit stop valves (gas stop valve, liquid stop valve)
•
Water heater stop valves (water heater inlet stop valve,
water heater outlet stop valve)
Do the marks match (room A, room B, room C) on the wiring
and piping for each indoor unit?
Is the water heater piping length setting completed?
Is the water heater thermistor installed in the water heater?
Is the digital temperature indicator installed?
ATTENTION
•
Have the customer actually operate the unit while looking at the manual included with the indoor unit. Instruct the customer
how to operate the unit correctly (particularly cleaning of the air fi lters, operation procedures, and temperature adjustment).
•
Even when the air conditioner is not operating, it consumes some electric power. If the customer is not going to use the unit
soon after it is installed, turn off the breaker to avoid wasting electricity.
•
If additional refrigerant has been charged because of long piping, list the amount added on the nameplate on the reverse
side of the right side plate.
18
(When running in one room)
Check item
Cooling
Approx. 8°C
Consequences of trouble
Falling, vibration, noise
No cooling, the water does not heat up at all
Water leakage
Water leakage
Danger in the event of a ground fault
No cooling
Operation failure, burning
No cooling, the water does not heat up at all
No cooling, the water does not heat up at all
The water does not heat up suffi ciently
Hot water volume is not known
Check
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