32
English
INFORMATION
The refrigerant charge operation will automatically stop within 30
minutes. If charging is not completed after 30 minutes, perform the
additional refrigerant charging operation again.
Perform the test procedure as described in 15.4.2. Test operation on
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INFORMATION
• When a malfunction is detected during the procedure (e.g., in case
of closed stop valve), an error code will be displayed. In that case,
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accordingly. Resetting the malfunction can be done by pushing BS3.
The procedure can be restarted from 6).
• Aborting the refrigerant charge is possible by pushing BS3. The unit
will stop and return to idle condition.
• Please refer to the Maintenance and service check list available
on Daikin City or contact your Daikin representative for the latest
document.
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error code and take corresponding action, 15.5. Error code list on
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14.3.3. Final charge adjustment
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following operation only when if the most adequate refrigerant for the
best performance is required.
The outdoor temperature must be between 60°F (16°C) and 97°F
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Purge gauge lines. Connect service gauge manifold to the service
port between the compressor and the reversing valve in each outdoor
unit. Run the system for 30 minutes in cooling by the forced operation
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then check subcooling as detailed in the following sections.
Subcooling = Sat. Liquid Temp. – Liquid Line Temp.
1
Temporarily install a thermometer on the liquid line between the
coil and the EV in each outdoor unit. Ensure the thermometer
makes adequate contact and is insulated for best possible read-
ings. Use liquid line temperature to determine sub cooling.
2
Check subcooling for each outdoor unit and calculate the average
subcooling of the outdoor unit. Systems should have a subcooling
of 11±3°F (6±2°C).
a. If average subcooling is low, add charge to raise subcooling to
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(2kg))
b. If average subcooling is high, remove charge to lower the sub-
cooling to 11±3°F (6±2°C)
14.3.4. Checks after adding refrigerant
• Are all stop valves open?
• Is the amount of refrigerant, that has been added, recorded on the
refrigerant charge label?
NOTE
• Make sure to open all stop valves after (pre-) charging the refrigerant.
Operating with the stop valves closed will damage the compressor.
• After adding the refrigerant, do not forget to close the cover of the
service port. The tightening torque for the cover is 7.9 to 10.8 ft
x
lbf
(10.7 to 14.7 N
x
m).
15.
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INFORMATION
It is important that all information in this chapter is read sequentially by
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DANGER: ELECTRICAL SHOCK
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15.1. Checks before initial start-up
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unit be powered up.
1
Installation
Check that the unit is properly installed, to avoid abnormal noises
and vibrations when starting up the unit.
2
Field wiring
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the wiring diagrams and according to the applicable legislation.
3
Power supply voltage
Check the power supply voltage on the local supply panel. The
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of the unit.
4
Ground wiring
Be sure that the ground wires have been connected properly and
that the ground terminals are tightened.
5
Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation resistance
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between power terminals and ground. Never use the megatester
for the transmission wiring.
6
Fuses, circuit breakers, or protection devices
Check that the fuses, circuit breakers, or the locally installed pro-
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has been bypassed.
7
Internal wiring
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connections or damaged electrical components.
8
Pipe size and pipe insulation
Be sure that correct pipe sizes are installed and that the insulation
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9
Stop valves
Be sure that all stop valves are open.
10
Damaged equipment
Check inside of the unit on damaged components or squeezed pipes.
11
Refrigerant leak
Check inside of the unit on refrigerant leakage. If there is a refriger-
ant leak, try to repair the leak. If the repair is unsuccessful, call your
local dealer. Do not touch any refrigerant which has leaked out
from refrigerant piping connections. This may result in frostbite.
12
Oil leak
Check the compressor for oil leakage. If there is an oil leak, try to
repair the leak. If the repairing is unsuccessful, call your local dealer.
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