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Perform the test procedure as described in 15.4.2. Test operation on
INFORMATION
When a malfunction is detected during the procedure (e.g., in case
of closed stop valve), a malfunction code will be displayed. In that
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malfunction accordingly. Resetting the malfunction can be done by
pushing BS3. The procedure can be restarted from 6b).
Aborting the manual refrigerant charge is possible by pushing BS3.
The unit will stop and return to idle condition.
Information which may occur during additional refrigerant charging
procedures:
P8: Indoor unit freeze up prevention.
Action: Close valve A immediately. Push BS1 to reset. Retry auto-
matic charging procedure.
P2: Unusual low pressure on suction line.
Action: Close valve A immediately. Push BS1 to reset. Check follow-
ing items before retrying automatic charging procedures:
- Check if gas pipe stop valves are opened correctly.
- Check if the valve of the refrigerant cylinder is opened.
- Check if air inlet and outlet of indoor units are not obstructed.
E-2:
Indoor temperature is out of range.
E-3:
Outdoor temperature is out of range.
E-5
: An indoor unit which is not compatible with automatic refrigerant
charging functionality is installed (e.g., Mini-split indoor unit, etc.)
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function code and take corresponding action, 15.5. Malfunction code
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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.
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Run the system for 30 minutes in cooling by the forced operation using
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check subcooling as detailed in the following sections.
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and calculate the average subcooling of the outdoor unit using
weighted average method. (shown below) .
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in the manual that comes with the kit.
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S1 = O-1 Subcooling (Outdoor Unit 1)
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S2 = O-2 Subcooling (Outdoor Unit 2)
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S3 = O-3 Subcooling (Outdoor Unit 3)
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Systems should have a subcooling of 9±2°C.
a. If average subcooling is low, add charge to raise subcooling to
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b. If average subcooling is high, remove charge to lower the sub-
cooling to 9±0.5°C.
3P362438-5N English
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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.
15. Start up and configuration
INFORMATION
It is important that all information in this chapter is read sequentially
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connecting with DOAS system, ensure that all information in DOAS
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ured as applicable per the DOAS Installation Manual.
DANGER: ELECTRICAL SHOCK
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NOTE
Additional start-up procedures are required when installing the
outdoor unit connected to a VRV DVS DOAS unit. Refer to the VRV
DVS DOAS installation manual for DOAS start-up procedures before
proceeding with VRV system start-up.
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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 voltage
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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 protection
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Be sure that neither a fuse nor a protection device has been bypassed.
7 Internal wiring
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connections or damaged electrical components.
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8 Pipe size and pipe insulation
Be sure that correct pipe sizes are installed and that the insulation
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