Haier 3U19FS1ERA Service Manual - Page 84

Reduce FQY slowly 1HZ/10S

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>_]]VbTZR\ _^UZdZ_^Vb 3.8 Frequency control when there is CT over current protection 1.0 I Stop immediately, if abnormal stop 3 times in 1 hour, the unit will stop and alarm. 0.95I Reduce FQY rapidly 2HZ/S 0.93I Reduce FQY rapidly 1HZ/S 0.90I Reduce FQY slowly 1HZ/10S 0.88I Remain FQY 0.85I Increase FQY slowly 1HZ/10S 3.9 High pressure protection When the input signal of pressure switch is high level:1, that shows there is no protection. When the input signal of pressure switch is low level: 0 for 1 minute, that shows high pressure protection works. At this time, compressor stops, outdoor will send the alarm signal. The alarm can be resumable. If in 60 minutes, the failure occurs 3 times, the failure can be confirmed and send failure code to indoor. Meanwhile, by controling the max. condensate temp. Tc (cooling) or TmAVE (heating), please confirm as follow: In nominal cooling/dry/heating mode, high pressure can be controlled by limiting the max. frequency. 69℃ 68℃ Keep for 5 seconds, stop to alarm, after 3-minute standby, the unit can restartup. In 60 minutes it occurs 3 times continously, unit will stop to alarm and the failure can be resumed after being electrified again. Reduce FQY rapidly 2HZ/S Condensing temp. 66℃ Reduce FQY rapidly 1HZ/S 64℃ Reduce FQY slowly 1HZ/10S 62℃ Remain FQY 60℃ Increase FQY slowly 1HZ/10S 3.10 Low pressure protection (1) When compressor is running, if output signal of low pressure switch is low level: 0 for 1 minute continously, compressor will stop,outdoor alarms. The alarm can be resumable. If in 60 minutes, the failure occurs 3 times, the failure can be confirmed and send failure code to indoor. (2) When compressor no running, if output signal of low pressure switch is low level: 0 for 30 seconds continously, alarm will occur. -83-

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When the input signal of pressure switch is high level:1, that shows there is no protection.
When the input signal of pressure switch is low level: 0 for 1 minute, that shows high pressure protection
works. At this time, compressor stops, outdoor will send the alarm signal. The alarm can be resumable. If
in 60 minutes, the failure occurs 3 times, the failure can be confirmed and send failure code to indoor.
Meanwhile, by controling the max. condensate temp. Tc (cooling) or TmAVE (heating), please confirm as
follow:
In nominal cooling/dry/heating mode, high pressure can be controlled by limiting the max. frequency.
(1) When compressor is running, if output signal of low pressure switch is low level: 0 for 1 minute
continously, compressor will stop,outdoor alarms.
The alarm can be resumable. If in 60 minutes, the
failure occurs 3 times, the failure can be confirmed and send failure code to indoor.
(2) When compressor no running, if output signal of low pressure switch is low level: 0 for 30 seconds
continously, alarm will occur.
Condensing temp.
Keep for 5 seconds, stop to alarm, after 3-minute standby, the
unit will stop to alarm and the failure can be resumed after being
electrified again.
Reduce FQY rapidly 2HZ/S
Reduce FQY rapidly 1HZ/S
Reduce FQY slowly 1HZ/10S
Remain FQY
Increase FQY slowly 1HZ/10S
1.0 I
0.95I
0.93I
0.90I
0.88I
0.85I
Stop immediately, if abnormal stop 3 times in 1 hour, the
unit will stop and alarm.
Reduce FQY rapidly 2HZ/S
Reduce FQY rapidly 1HZ/S
Reduce FQY slowly 1HZ/10S
Remain FQY
Increase FQY slowly 1HZ/10S
℃
68
℃
66
℃
64
℃
62
℃
60
℃
±²³³´µ¶·¸¹ º·µ ±²»¼·½·²»´µ
unit can restartup. In 60 minutes it occurs 3 times continously,
69
-83-
3.8 Frequency control when there is CT over current protection
3.9 High pressure protection
3.10 Low pressure protection