Johnson Controls DCX18CSB21S, Руководство по обслуживанию

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Technical Information
Service Manual
(12) Start-up Failure Protection for Compressor
Stop the compressor after its start-up fails, restart it after 20s if the fault doesn’t show, and if they are all failing for the successive start s
three times, report it as Start-up Failure, and then restart it after 3min. When it still doesn't operate after carrying out the above process five
times, it is available if press ON/OFF. And the compressor should be cleared the times after it run s 2min.
(13) Out-of-Step Protection for Compressor
The out-of-step protection signal should be detected immediately after starting up compressor, and once find ing the out-of-step protection
signal, the out-of-step protection should be stopped . if it can run for lasting power turn-off 3min, the machine should be allowed to operate. If
it still can’t run automatically when the out-of-step protection for compressor happens to stop working for six times in succession, press ON/
OFF to operate. And if the running time is more than 10min, the power turn-off times for out-of-step protection should be cleared and
recounted.
(14) Voltage Abnorm ality Protection for DC Bus
To detect voltage abnorm ality protection for dc bus after completing the pre-charge:
1.Over-High Voltage Protection for DC Bus:
If it found the DCbus voltage U
DC
>[UDC
Jiekuangchun Protection
], turn off PFC and stop the compressor at once . It should show the DC over-high
voltage failure; it should clear out the failure when the voltage dropped to U
DC
<[UDC
Jiekuangchun Recovery
] and the compressor stopped for 3min.
2.Over-Low Voltage Protection for DC Bus:
If it found the DC bus voltage U
DC
<[U
DC Wantuochun Protection
], turn off PFC and stop the compressor at once . It should show the DC over-low
voltage; and it should clear out the failure when the voltage raised to U
DC
>[U
DC Wantuochun Recovery
] and the compressor stopped for 3min.
3.To detect voltage abnorm ality protect for DC bus when getting electricity:
If it found the DC bus voltage U
DC
>[U
DC——Over-High Voltage
], turn off the relay at once, and shows voltage abnormity failure for DC Bus. And the
failure can’t recover except to break off and get the electricity.
(15) Abnorm ality Protection for 4 -way Valve
Under the model of heating operation in good condition: the compressor is detected [T
Inner Tube
<(T
Inner Ring
-T
Abnormity Temperature Difference For Four-Way
Reversion
)], during the running . I t should be regarded as 4 -way valve reversion abnorm ality . And then it can run if stop ping the reversion
Valve
abnormity protection for
4 -way valve 3min . If it still can’t run when the reversion abnorm ality protection for 4 -way valve happens to stop
working for three times in succession, it is available if press ing ON/OFF.
Attention: T he protection should be shielded during the testing mode and defrosting process, and it should clear out the failure and its
times immediately when turning off or delivering air / cooling / dehumidifying mode conversed (the inverted mode doesn't clear out the
failure when it can’t recover to operate).
(16) PFC Protection
1. After start - up the PFC, it should detect the protection signal of PFC immediately; under the condition of PFC protection, it should turn off
PFC and compressor at one time .
2. It shows the failure is cleared out if PFC Protection stopped working 3min and recovers to run automatically .
3. If it still can’t run when it occurs PFC protection for three times in succession, it is available if presses ON/OFF; and clear the PFC
Protection times when starting up PFC for 10min.
(17) Failure Detection for Sensor
1. Outdoor Ambient Sensor: D etect the failure of sensor at all times.
2. Outdoor Tube Sensor: You should not detect the failure of outdoor tube sensor within 10 minutes of heating
operation compressor except the defrosting, and you could detect it at an other time.
3. Outdoor Exhaust Sensor:
(a) The compressor only detect
s the sensor failure after it runs 3min in normal mode;
(b) It should detect the exhaust sensor failure immediately in the testing mode.
4. Module Temperature Sensor:
(a) Short-Circuit Detection:
T he compressor should be detected immediately when the module temperature
sensor occurs short-circuits .
(b) Open-Circuit Detection: T he compressor should be detected on open-circuit when it runs 3min (it doesn't
need 30s avoiding the module over-heated).
(c) Detect the sensor failure at all times in the testing mode.
5. Disposal for Sensor Protection
(1) When the short-circuit of sensor is detected within 30s, i t is regarded as the temperature of sensor over-high (or infinitely high), and now
according to the over-high sensor, the machine should carry out the corresponding protection to stop working, and show the
corresponding temperature shutdown protection and sensor failure at the same time
. ( F or example: the compressor stops immediately when
the outdoor tube sensor short-circuit s , and the machine shows the overload protection and outdoor tube sensor failure)
(2) When the open-circuit of sensor is detected within 30s, t he protection shall be stopped and it shall show the corresponding sensor failure.