SanRex CALPOTE UF-1 Series, Instruction Manual

Page: 15 / 26

13
DETECTION OF ABNORMALITY
Detection and indication of abnormality
In the event of any abnormality, check the Unit Abnormality lamp, stop operation of the unit, and
then turn off power.
When an abnormality detection circuit functions, an abnormality indication lamps lights up or flickers on
the right-hand side of the terminal block inside the front panel of the unit.
Abnormality indications, abnormality descriptions, operating status, and procedures to restart operation
are as listed below.
1 This abnormality is available only for an 100A unit or larger.
2 This abnormality is available only for an unit with fuse.
3 This abnormality is available only for an unit equipped with a conversion board for detection of
heater disconnection (optional).
OCR
This detects overcurrent when the current exceeding 150 percent of the unit’s rated current has flowed
over several cycles. On detection of overcurrent, an “OCR” indication lights up and operation stops. To
resume operation, turn off the control power supply.
TMP
This detects temperature rise abnormality when the temperature of a cooling fin has been increased
abnormally. On detection of temperature rise abnormality, a “TMP” indication lights up and operation
stops. To resume operation, turn off the control power supply.
Abnormality
indication Abnormality
description Operating status
after detection of
abnormality Procedures to
restart
operation
Light-emitting
diode is lit. OCR Detection of
overcurrent Operation stops. Turn off power.
TMP Temperature rise
abnormality Operation stops. Turn off power.
1
F Fuse disconnection Operation stops. Turn off power.
2
HET Heater disconnection
(optional) Operation continues.
3
Light-emitting
diode flickers. THY Thyristor short Operation stops. Turn off power.
Thyristor open Operation stops. Turn off power.
LOD Load short Operation stops. Turn off power.
Load open Operation continues.
FRQ Abnormal frequency Operation continues.
L. Vo Power supply
undervoltage Operation stops. Operation is
automatically
recovered.
CAUTION