Kikusui PWX1500H, User Manual

Page: 36 / 131

36
PWX
Protection Functions and Alarms
The PWX series is equipped with the following protection functions.
• Overvoltage protection (OVP) • Overvoltage protection 2 (OVP2)
• Overcurrent protection (OCP) • Undervoltage limit (UVL)
• Overheat protection (OHP) • Overheat protection 2 (OHP2)
• Fan failure protection (FAN)
• Incorrect sensing connection protection (SENSE)
• Low AC input protection (AC-FAIL)
• Shutdown (SD)
• Power limit (POWER LIMIT) • Communication monitoring (WATCHDOG)
Alarm occurrence and clearing alarms
Alarm occurrence
When a protection function has been activated, the PMX750ML behaves as follows.
• The output turns off.
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For the overheat protection (OHP), fan failure protection (FAN), and low AC input protec-
tion (AC-FAIL), you can use the CONFIG settings to select to turn the output on automati-
cally when the problem that caused the alarm is fixed (CF03: Auto) or to leave the output
turned off when the problem that caused the alarm is fixed (CF03: SAFE). This parameter
is the same for the OHP, FAN, and AC-FAIL alarms. You cannot set this parameter sepa-
rately for each protection function.
• The ALARM LED in the front panel display area lights to indicate that an alarm has
occurred. The voltmeter indicates the cause of the alarm.
• The ALARM LED in the front panel display area blinks (only when the power limit has
been activated).
• The OUTPUT LED in the front panel display area blinks (only when a protection function
has been activated when the output is on).
If a protection function is activated when the output is on, the ALARM LED lights and the
OUTPUT LED blinks in orange.
If the PWX series is set so that output turns on automatically after the problem that
caused the alarm is fixed (CF03: Auto), the output is turned on and the OUTPUT LED
lights automatically when the problem that caused the alarm is fixed.
If the PWX series is set so that output remains off even after the problem is fixed (CF03:
SAFE), output remains off even after the problem that caused the alarm is fixed.
• The alarm signal is generated from pin 14 of the J1 connector (when the OVP/ OVP2/
OCP/ OHP/ OHP2/ FAN/ SEN/ AC-FAIL/ SD/ WATCHDOG has been activated).
Lit
Lit
Blinking (in orange)
Alarm indication when
OHP has been activated
Alarm indication when OHP has been
activated with the output on
See
When a CONFIG parameter is being displayed, only the ALARM LED turns on; the cause of
alarm is not displayed. To view the cause of the alarm, exit from the CONFIG parameter dis-
play.