GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
172
Part 3 Key Parts Maintenance
I. Cautions on Controller AP1 Replacement
1. Cautions on ODU AP1 Replacement
1.1 Distinguishing Master Module from Slave Module
Before replacing ODU AP1, determine the module is a master ODU or a slave ODU. They can be
distinguished based on:
①
―Master module DIP state (
SA8_MASTER-S
)‖
Every cooling system has only one master module (set in power-
off state). When a DIP is ―ON‖, the
corresponding position is ―0‖; when the DIP is ―OFF‖, the corresponding position is ―1‖. If
SA8_MASTER-
S is set to ―00‖, it indicates a master module; if it is set to ―10‖, it indicates a
slave module
(as shown in the figure below).
DIP setting
position
DIP setting
position
DIP setting
position
DIP setting
position
Master module state
Slave module state
②
AP1 LED
When a master module is powered on, LED1 is displayed as ―01‖. For a slave module, LED1 is
displayed as ―02‖, ―03‖ or ―04‖ (as shown in the figure below).
LED1 display state
Master module state
LED1 display state
Slave module state
LED1 display state
Slave module state
LED1 display state
Slave module state
Or
Or
1.2 Cautions on Replacement of Master ODU AP1
Before replacing master module AP1, make the following preparations:
①
Master module DIP setting
Set the new AP1 identical to the faulty AP1. Note that settings must be performed when the master ODU
is powered off and they will take effect after the ODU is powered on. Settings that are performed in
power-on state are invalid.
②
Communication state check
After AP1 DIP setting and all wiring, power on the master ODU AP1 and check whether D3 and D4 LEDs
are flashing. See the figure below:
Power
Run
D1
D2
D3
D4
D5
D6
D7
D8
Power
Running
IDU and ODU
communication
Main
system
M a i n -
system
Reserved
ODU
→
IDU
ODU
→
IDU
Inter-system
communication
System1
→
System2
System1
→
System2
If the LEDs flash, the ODU and IDUs normally communicate; if the LEDs are steadily on, communication
Содержание GMV-224WM/B-X
Страница 1: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL T1 R410A 50 60Hz GC201508...
Страница 6: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 3 2 Piping Diagram of GMV 400WM B X and GMV 450WM B X...
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Страница 45: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 42 Part 5 Piping Connection Schematic Diagram of Piping Connection...
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Страница 156: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 153 low press ure air pipe...
Страница 158: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 155 2 Low exhaust temperature protection E2...
Страница 159: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 156 3 System high pressure protection E1 4 System low pressure protection E3...
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Страница 224: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 221 2 Model GMV 335WM B X Exploded View...
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Страница 230: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 227 4 Model GMV 504WM B X GMV 560WM B X GMV 615WM B X Exploded View...
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Страница 248: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 245 Click Finish...
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Страница 277: ...GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 274 Power input Gateway Running Alarm Power Address Function...
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