Mitsubishi Heavy Industries FDT200VSAWPVH Service Manual page 169

Power cable size
Model Power supply
(mm
200V
3 phase 4 wire
250V 380-415V 50Hz 5.5
380V 60Hz
280V
※
In case of FDU indoor unit combination.
Power cable size
Model Power supply
(mm
200V
3 phase 4 wire
250V 380-415V 50Hz 5.5
380V 60Hz
280V
5. COMMISSIONING
●
Before conduct a test run, make sure that the service valves are opened.
WARNING
●
Turn on power 6 hours prior to a test run to energize the crank case heater.
●
In case of the first operation after turning on power, even if the unit does not move for 30 minutes, it is not a breakdown.
●
Always give a 3-minute or longer interval before you start the unit again whenever it is stopped.
●
Removing the service panel will expose high-voltage live parts and high-temperature parts, which are quite dangerous.
Take utmost care not to incur an electric shock or burns. Do not leave the unit with the service panel open.
●
When you operate switches (SW3, SW5) for on-site setting, be careful not to touch a live part.
CAUTION ●
You cannot check discharge pressure from the liquid operation valve charge port.
●
The 4-way valve (20S) is energized during a heating operation.
●
When power supply is cut off to reset the unit, give 3 or more minutes before you turn on power again after power is cut
off. If this procedure is not observed in turning on power again, "Communication error between outdoor and indoor unit"
may occur.
1) Test run method
(1) A test run can be initiated from an outdoor unit by using SW3-3 and SW3-4 for on-site
setting.
(2) Switching SW3-3 to ON will start the compressor.
(3) The unit will start a cooling operation, when SW3-4 is OFF, or a heating operation, when SW3-4 is ON.
(4) Do not fail to switch SW3-3 to OFF when a test run is completed.
2) Checking the state of the unit in operation
Use check joints provided on the piping before and after the four-way valve installed inside the outdoor
unit for checking discharge pressure and suction pressure.
As indicated in the table shown on the right, pressure detected at each point will vary
depending on whether a cooling or heating operation has been selected.
3) Setting SW3-1, SW3-2, on-site
(1) Defrost control switching (SW3-1)
・ When this switch is turned ON, the unit will run in the defrost mode more frequently.
・ Set this switch to ON, when installed in a region where outdoor temperature falls below zero during the season the unit is run for a heating
operation.
(2) Snow guard fan control (SW3-2)
・ When this switch is turned on, the outdoor unit fan will run for 10 seconds in every 10 minutes, when outdoor temperature falls to 3℃ or
lower and the compressor is not running.
・ When the unit is used in a very snowy country, set this switch to ON.
4) Failure diagnosis in a test run
Printed circuit board LED(The cycles of 5 seconds)
Error indicated on the
remote control unit
Red LED Green LED
E40 Blinking once Blinking continuously
Blinking once Blinking continuously
E49
●
If an error code other than those listed above is indicated, refer to the wiring diagram of the outdoor unit and the indoor unit.
5) The state of the electronic expansion valve.
The following table illustrates the steady states of the electronic expansion valve.
When power is turned on
Valve for a cooling operation Complete shut position
Valve for a heating operation
Full open position
6) Heed the following on the first operation after turning on the circuit breaker.
・ This outdoor unit may start in the standby mode (waiting for a compressor startup), which can continue up to 30 minutes, to prevent the oil level
in the compressor from lowering on the first operation after turning on the circuit breaker. If that is the case, do not suspect a unit failure.
・ At the first operation of heating mode after turning on the circuit breaker, the outdoor unit may start in cooling mode a while to prevent from
liquid refrigerant back to compressor. If that is the case, do not suspect a unit failure.
6. UTILIZATION OF EXISTING PIPING
Check whether an existing pipe system is reusable or not by using the following flow chart.
START
Are an outdoor unit and an indoor unit connected to the
existing pipe system to reuse?
YES
Are the existing units our products?
YES
Does the existing pipe system to reuse satisfy all of the following?
(1) The pipe length is 50m or less.
(2) The pipe size conforms to the table of pipe size restrictions.
(3) The elevation difference between the indoor and outdoor units
conforms to the following restrictions.
Where the outdoor unit is above: 30m or less
Where the outdoor unit is below: 15m or less
YES
Is the unit to install in the existing pipe system a
twin-triple-double-twin model?
NO
Is the existing pipe system to reuse free of corrosion, flaws or dents?
NO
Is the existing pipe system to reuse free of gas leaks?
(Check whether refrigerant charge was required frequently for
the system before)
NO
Are there any branch pipes with no indoor unit connected?
NO
Are heat insulation materials of the existing pipe system to
reuse free of peel-offs or deterioration?
(Heat insulation is necessary for both gas and liquid pipes)
NO
Aren't there any loose pipe supports?
No loose pipe supports
The existing pipe system is reusable.
WARNING <Where the existing unit can be run for a cooling operation.>
Carry out the following steps with the excising unit (in the order of (1), (2), (3) and (4))
(1) Run the unit for 30 minutes for a cooling operation.
(2) Stop the indoor fan and run the unit for 3 minutes for a cooling operation (returning liquid)
(3) Close the liquid side service valve of the outdoor unit and pump down (refrigerant recovery)
(4) Blow with nitrogen gas. ※ If discolored refrigeration oil or any foreign matters is discharged by the blow,
wash the pipe system or install a new pipe system.
●
For the flare nut, do not use the old one, but use the one supplied with the outdoor unit.
Process a flare to the dimensions specified for R32.
Turn on-site setting switch SW5-1 to the ON position. (Where the gas pipe size is φ 19.05)
●
MAX. over current Power cable length
Earth wire size
2 ) (A) (m)
19 72
φ1.6mm
20 69
20 69
MAX. over current Power cable length
Earth wire size
2 )
(A) (m)
23 60
φ1.6mm
25 55
25 55
SW-3-3 SW-3-4
OFF
ON
ON
OFF - - - -
Check joint of the pipe
Cooling Discharge pressure
operation
Heating
operation
Failure event
63H1 actuation or operation with service valves shut
1. Check whether the service valves are open.
(occurs mainly during a heating operation)
2. If an error has been canceled when 3 minutes have elapsed
since a compressor stop, you can restart the unit by
Low pressure error or operation with service valves shut
effecting Check Reset from the remote control unit.
(occurs mainly during a cooling operation)
When the unit comes to a normal stop When the unit comes to an abnormal stop
During a cooling operation During a heating operation During a cooling operation
Complete shut position Full open position Full open position
Full open position Complete shut position Full open position
NO
Which of the following refrigeration oils
NO
does the existing unit use?
NO
Make an inquiry
Suniso, MS, Barrel Freeze, HAB, Freol,
for reusability.
YES
ether oil, ester oil
Can Use
NO
※Check with the flow chart developed for a case where
an existing pipe system is reused for a
twin-triple-double-twin model published as a
technical data sheet.
YES Change is impossible.
Change the branching pipe to a specified type.
Change
YES Repair is impossible.
Repair the damaged parts.
Repair
Air tightness is
impossible.
Check the pipe system for air tightness on the site.
Air tightness is OK
Remove is
impossible
Remove those branches.
Remove
Repair is impossible.
Repair the damaged parts.
Repair
Repair the damaged parts.
Some loose pipe supports
Repair
The existing pipe system is not reusable.
Install a new pipe system.
※
In case of FDUM indoor unit combination.
Indoor-outdoor
Model Power supply
wire size × number
200V
3 phase 4 wire
φ1.6mm × 3
250V 380-415V 50Hz
380V 60Hz
280V
Indoor-outdoor ●
The specifications shown in the above table are for units without heaters. For units with heaters, refer to the installation instructions or the construction instructions of the
wire size × number indoor unit.
●
Switchgear or circuit breaker capacity which is calculated from MAX. over current should be chosen along the regulations in each country.
●
The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than three cables contained in a conduit and a voltage drop is 2%.
φ1.6mm × 3
For an installation falling outside of these conditions, follow the internal cabling regulations. Adapt it to the regulation in effect in each country.
●
Use an all-pole disconnection type breaker with at 3mm or more gap between the contact points, that provide full disconnection under over-voltage category III.
A failure to observe these instructions can result in a compressor breakdown.
Items to check before a test run
Item No.used in the
installation manual
2
Cooling during a test run
Heating during a test run
Normal or After the test operation
4
Charge port of the
gas service valve
Suction pressure
(High pressure) (Low pressure)
Suction pressure Discharge pressure
ー
(Low pressure) (High pressure)
Test run procedure
Turn
①
Open the gas side service valve fully.
②
Open the liquid side service valve fully.
③
Close the panel.
④
Where a remote control unit is used for unit setup on the installation site, follow instructions for unit setup on the installation site with a remote control unit.
SW3-3 ON / SW3-4 OFF: the unit will start a cooling operation.
⑤
SW3-3 ON / SW3-4 ON: the unit will start a heating operation.
⑥
When the unit starts operation, press the wind direction button provided on the remote control unit to check its operation.
⑦
Place your hand before the indoor unit's diffuser to check whether cold (warm) winds come out in a cooling (heating) operation.
⑧
Make sure that a red LED is not blinking.
Action
⑨
When you complete the test run, do not forget to turn SW3-3 to the OFF position.
⑩
Where options are used, check their operation according to the respective instruction manuals.
<200V, 250V, 280V>
During a heating operation
Full open position
Full open position
<Where the existing unit cannot be run for a cooling operation.>
Wash the pipe system or install a new pipe system.
●
If you choose to wash the pipe system, contact our distributor in the area.
<Table of pipe size restrictions>
Applicable pipe size combination is restricted by the following table.
Pipe length is limited according to the total refrigerant charge amount.
Can't For additional charging amount of refrigerant, refer to 2.8) Additional refrigerant charge.
Use ◎:Standard pipe size ○:Usable
△:Restricted to shorter pipe length limits ×:Not usable
Liquid pipe
Pipe size
Gas pipe
200V
Usability
250V
280V
<Pipe system after the branching pipe>
Liquid pipe
Pipe size
Gas pipe
Model Combination type
Twin
Triple A
200V
Triple B
Double twin
Twin
Triple A
250V
Triple B 60+60+125, 71+71+140
280V
Triple B
Double twin
60+60+60+60, 71+71+71+71
※1 Because of its insufficient pressure resistance, turn the DIP switch SW5-1 provided on the outdoor unit board to the ON position for φ19.05 × t1.0.
(In the case of a twin-triple-double-twin model, this also applies to the case where φ19.05 × t1.0 is used in a pipe system after the first branching point.)
However, you need not turn the DIP switch SW5-1 to the ON position, if 1/2H pipes or pipes having 1.2 or thicker walls are used.
※2 When the main pipe length exceeds 40m, a significant capacity drop may be experienced due to pressure loss in the liquid pipe system. Use φ12.7 for
the liquid main.
※3 Piping size after branch should be equal or smaller than main pipe size.
※4 Piping size from first branch to indoor unit should be φ9.52 (Liquid) /φ15.88 (Gas).
Any combinations of pipe sizes not listed in the table or marked with × in the table are not usable.
●
<The model types of existing units of which branching pipes are reusable.>
Models later than Type 8.
F D C ＊ ＊ ＊ 8 □ □ □
●
The branching pipes used with models other than those listed above are not reusable because of their insufficient
pressure resistance. Please use our genuine branching pipes for R32.
＊ ＊ ＊ are numbers representing horsepower. □ □ □ is an alphanumeric letter.
●
Formula to calculate additional charge volume
Refer to "2. REFRIGERANT PIPING WORK", "8) Additional refrigerant charge".
168
- -
'21 • PAC-SM-383
Power cable size MAX. over current Power cable length
(mm 2 ) (A) (m)
19 72
5.5 20 69
22 62
● When you leave the outdoor unit with power supplied to it,
be sure to close the panel.
Item Check item
If brazed, was it brazed under a nitrogen gas flow?
Were air-tightness test and vacuum extraction surely performed?
Refrigerant
Are heat insulation materials installed on both liquid and gas pipes?
plumbing
Are service valves surely opened for both liquid and gas systems?
Have you recorded the additional refrigerant charge volume and refrigerant pipe length on the panel's label?
Is the unit free of cabling errors such as uncompleted connection, an absent or reversed phase?
Are properly rated electrical equipments used for circuit breakers and cables?
Doesn't cabling cross-connect between units, where more than one unit are installed?
Aren't indoor-outdoor signal wires connected to remote control wires?
Electric
Do indoor-outdoor connecting cables connect between the same terminal numbers?
wiring
Are either VCT cabtyre cables or WF flat cables used for indoor-outdoor connecting cables?
Does grounding satisfy the D type grounding (type III grounding) requirements?
Is the unit grounded with a dedicated grounding wire not connected to another unit's grounding wire?
Are cables free of loose screws at their connection points?
Are cables held down with cable clamps so that no external force works onto terminal connections?
Is indoor unit installation work completed?
Indoor unit
Where a face cover should be attached onto an indoor unit, is the face cover attached to the indoor unit?
● Always carry out a test run and check the following in order as listed.
The contents of operation
SWITCHES FOR ON-SITE SETTING
All set to OFF for shipment
φ 9.52 φ 9.52 φ 9.52 φ 12.7 φ 12.7 φ 12.7 φ 15.88 φ 15.88 φ 15.88
φ 22.22 φ 25.4 φ 28.58 φ 22.22 φ 25.4 φ 28.58 φ 22.22 φ 25.4 φ 28.58
◎ ○ ※2 ○ ※2 △ ◎ ◎ △
× × × ◎ ◎ ◎ △
After 1st branch ※3 After 2nd branch
φ 9.52
φ 12.7 φ 15.88 φ 19.05 ※1 φ 12.7 φ 15.88
Combination of capacity
× ◎ ○ ー
100+100
× ◎ ○ ー
71+71+71
× ◎ ○ ※4 ×
71+71+71
× ◎ ○ ◎
50+50+50+50
× ◎ ○ ー
125+125, 140+140
ー ー ー ー ー
× ◎ ○ ※4 ◎
× ◎ ○ ※4 ×
71+71+100
× ◎ ○ ◎
F D C P ＊ ＊ ＊ 8 □ □ □
●
Indoor-outdoor
Earth wire size
wire size × number
φ1.6mm φ1.6mm × 3
Check
Check
SW3
ON
1 2 3 4
△ ×
△ △
φ 9.52
φ 19.05 ※1
ー ー
ー ー
◎ ○
○ ×
ー ー
ー ー
× ×
◎ ×
○ ×