83
8.
Trouble Shooting
8-1.
Cause and treatment of main defects
Contents of defects
Cause
Treatment
Error message
display
Refer to cause and
treatment of error display
Refer to cause and treatment of error display
PV display is not
normal
Mismatch of instrument
and input.
Fault in the wiring.
Type code, check of specification.
Check of wiring.
Display disappeared
and does not operate
Power is not supplied.
Abnormality of instrument.
Check of a power supply
(voltage of terminal, switch, fuse, wiring).
Key operation
impossible
Keylocked.
Abnormality of instrument.
Release of keylock.
Check of instrument, repair, exchange.
8-2.
Cause and treatment of error display
Error display
Contents
Cause
Treatment
（ＨＨＨＨH）
Scale over in upper limit
1. wire breaking of thermocouple
input
2. wire breaking of resistance bulb
input A
3. when input exceeds upper limit of
measuring range by 10%
1.wire breaking check of thermocouple input
wiring, replacement of thermocouple
2.check of resistance bulb A wiring,
replacement of resistance bulb
3.check of input voltage value and current
value, input transmitter and specification
(matching of incoming signal and meter
specification)
（ＬＬLＬＬ）
Scale over in lower limit
1.when input exceeds lower limit of
measuring range by 10%
2.wire breaking of resistance
bulb input B
1.polarity of input is reverse, check of wiring
and an input transmitter
2.check of resistance bulb B wiring,
replacement of resistance bulb
（ ｂ - - - - ）
Breaking of resistance bulb input 1.wire breaking of b
1.check of resistance bulb wiring
2.multiple wire breaking
combinations in ABb
(A and B, A and b, B and b, all of
ABb)
2.replacement of resistance bulb
（ＣＪ_ＨＨ）
Cold junction (CJ) temperature of
thermocouple input is scale over
in upper limit side
When ambient temperature of a
meter exceeds 80℃
1. make Ambient temperature of meter within
use environment condition temperature
2. Check the meter when ambient
temperature is not over 80℃
（ＣＪ_ＬＬ）
Cold junction (CJ) temperature of
thermocouple input is scale over
in lower limit side
When ambient temperature of
meter becomes less than -20℃
1. Make ambient temperature of meter within
use environment condition temperature
2. Check the meter when ambient
temperature is not less than -20℃