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19

Table 20 — Display Code Definitions

SW8/SW9 Query Instructions

 — 

When you press

either SW8 or SW9, the MDC’s LED display will show a

query code. Press SW8 to move up in number. Press SW9 to

move down in number (i.e., 00) and then it will display the

corresponding value. See Table 21 for an explanation of these

display codes.

NOTE:

 The main MDC and sub MDC have the same query

instructions. If the sub MDC does not have this parameter it

displays the value of the main MDC unit.

Table 21 — MDC Query Codes 

TEST RUN

Before commencing a test run please check the following:

1. Ensure the MDC unit, indoor unit and outdoor unit are

installed correctly.

2. Ensure the piping and wiring are completed correctly.
3. Ensure there are no refrigerant leaks.
4. Ensure the drain is not clogged.
5. Ensure the piping is insulated.
6. Ensure the ground wiring is connected correctly.
7. Ensure the added refrigerant amount and added is correct,

based on the actual pipe length.

8. Ensure the supplied power voltage matches the voltage

on the unit nameplate.

9. Ensure the connected indoor unit quantity during the

quick check MDC query is the same as the actual

quantity.

DISPLAY

DSP1 AND DSP2 DISPLAY DEFINITION

S E0

Communication error with outdoor unit

S E1

T1 temperature sensor error

S E2

T2 temperature sensor error

S E3

T3 temperature sensor error

S E4

High pressure sensor error

S E5

Intermediate pressure sensor error

S E6

Low pressure sensor error

S P1

High pressure protection

SC ER

Commissioning test failure

no ID

No indoor unit under Indoor Unit 1

CS x

Indoor capacity overload under Indoor No.y 

(y=X+1)

DISPLAYED

DESCRIPTION

COMMENT

First and 

Second Digit

Third and

Fourth Digit

--00

Number of 

online micro-

processors

Number of 

online indoor 

units

Actual value

--01

Number of 

open micro pro-

cessors

Number of 

open indoor 

units

Actual value

--02

Number of 

cooling indoor 

units

Number of 

heating indoor 

units

Actual value

--03

Outdoor unit operation mode

--

--04

Opening of EXVA

Actual value

--05

Opening of EXVB

Actual value

--06

Opening of EXVC

Actual value

--07

Liquid inlet temperature (T1)

Actual value 

(degrees C)

--08

Liquid refrigerant temperature 

(T2)

Actual value

(degrees C)

--09

Bypass outlet temperature (T3)

Actual value

(degrees C)

--10

High pressure (H-YL1)

Actual value=

display value x 

0.1 MPa

--11

Intermediate pressure (H-YL2)

Actual value=

display value x 

0.1 MPa

--12

Low pressure (L-YL1)

Actual value=

display value x 

0.01 MPa

--13

Version of software

--

--14

----

Check end

Содержание 40VMD 008

Страница 1: ...1 Understand the signal words DANGER WARNING and CAUTION DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards that could result in...

Страница 2: ...required to service the equipment Seal circuits being serviced and charge with dry nitrogen to prevent oil contamination when timely repairs cannot be completed Failure to follow these procedures may...

Страница 3: ...fasten the connector between flexible condensate pipe and MDC condensate Condensate connection 2 Reducer for smaller pipe diameter only for size 018 unit PQE connection wire No of Ports 3 Connect out...

Страница 4: ...o determine if shipping screws are to be removed Remove screws as directed Step 2 Position the Unit Install the unit in a location that meets the following requirements Allow adequate space for instal...

Страница 5: ...e acceptable refer to the refrigerant piping allowable limits in the manual Refrigerant piping connection between indoor units should be performed once the units are secured at their respective instal...

Страница 6: ...6 Connecting Liquid Pipes to the Indoor Unit LEGEND Table 7 Combination Table INDOOR UNIT kBtu h LIQUID SIDE in GAS SIDE in 5 7 9 12 15 1 4 1 2 18 24 30 36 48 54 3 8 5 8 72 3 8 7 8 96 3 8 7 8 a c b L...

Страница 7: ...ecommended nitrogen flow rate is approximately 1 76 ft3 h This is brazing sequence for Note that the flow capacity through this system is limited so you cannot blow through the lines with a high flow...

Страница 8: ...C and the Y joint Table 8 Piping Between the MDC and Y Joint PIPING BETWEEN MDC AND SUB MDC 3 pipes are used to connect the main MDC and the sub MDC Selection of the Sub MDC should follow the requirem...

Страница 9: ...to a Single Sub MDC Fig 12 Connecting Main MDC to Two Sub MDCs Main MDC unit Outdoor unit Indoor Sub MDC1 Sub MDC2 unit Indoor Indoor unit High pressure pipe pipe Low pressure Liquid pipe High pressu...

Страница 10: ...13 For a typical example of running the refrigerant pipes see Fig 14 INDOOR UNIT CAPACITY kBtu h CONNECTION DIAGRAM 72 73 108 109 168 a MDC Unit b Sub MDC Pipe Accessory c Pipe 3 4 d Cut Here e Pipe 7...

Страница 11: ...r PS Pressure Sensor SV A SV B SVM SVP Solenoid Valve Tm Temperature Sensor Check valves PS3 Tm2 SVP EXVA Tm3 SV1A 1 SV1B 1 SVmA n SVmB n HEX2 separator Gas Liquid Tm3 Tm1 Tm2 SVMC EXVB EXVC SVME SVP...

Страница 12: ...O 1 Sub MDC Unit MDC Indoor NO 1 Indoor NO 2 Indoor NO 3 Indoor NO 4 Indoor NO 5 Indoor MDC Outdoor or Sub MDC Outdoor Sub MDC NO 1 Sub MDC Unit 6 5 4 3 1 2 Main MDC Unit Indoor Unit NO 3 NO 4 Indoor...

Страница 13: ...e outdoor unit should be in the closed position throughout the refrigerant piping process Failure to follow this procedure may result in equipment damage OUTDOOR MODEL kBtu h HIGH PRESSURE SIDE in LOW...

Страница 14: ...pe 1 1 8 g ODU Pipe Accessory h Pipe 1 3 8 k Pipe 1 5 8 WARNING Electrical shock can cause personal injury and death Disconnect power supply before making wiring connections There may be more than one...

Страница 15: ...his might cause disturbance on the controls side Use 2 core stranded shielded twisted pair communication wire Make sure the control wire does not form a closed loop The control wire is polarity sensit...

Страница 16: ...Indoor unit 5 Indoor unit 6 Outdoor Unit Centralized Controller No N Sub MDC unit 1 Touch Screen Wired Controller HA HB HA HB HA HB HA HB HA HB P Q P Q P Q P Q P Q P Q wired controller HA HB To No 1...

Страница 17: ...ommunication bus 75 16 250 5 75 16 M O M O CN10 CN12 CN51 TRANS OUT TRANS IN CN53 CN55 S3 CN41 EXVA T3 CN1 CN45 T1 T2 CN43 CN44 690 690 OXH 5HG OXH 5HG UHHQ XT1 1 M I 2 M I CN13 UHHQ URZQ 5HG KLWH OXH...

Страница 18: ...1 DSP2 CN53 CN52 CN51 EXVA EXVB EXVC CN27 WATER T3 CN25 CN20 T1 T2 HOORZ ODFN OXH 5HG OXH 5HG OXH 5HG UHHQ UHHQ UHHQ UHHQ UHHQ UHHQ URZQ 5HG KLWH OXH URZQ 5HG KLWH OXH URZQ 5HG KLWH OXH URZQ 5HG KLWH...

Страница 19: ...e as the actual quantity DISPLAY DSP1 AND DSP2 DISPLAY DEFINITION S E0 Communication error with outdoor unit S E1 T1 temperature sensor error S E2 T2 temperature sensor error S E3 T3 temperature senso...

Страница 20: ...7 the switch must be set to OFF OFF or ON ON v POSITION 1 2 S1 IDU PIPES SETTING OFF OFF Normal Mode default ON ON 2 Ports Twinned Together Fig A S1 S3 S5 and S7 Settings POSITION 1 2 S3 IDU PIPES SET...

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