K-Patents PR-21-S - Manual (Page 81)

8 Troubleshooting 75
8.1.7 Message HIGH SENSOR HUMIDITY
Tells that humidity measured at the Sensor processor card exceeds 60 % relative
humidity. The reason may be moisture leaking in through prism seal or the cover
being open. Also, check and, if necessary, replace prism seal, Section 7.3.2 “Re-
moving electronic cards PR-10301 and PR-10201”.
8.1.8 Message HIGH SENSOR TEMP
The temperature on the Sensor processor card exceeds 65 °C (150 °F). To read this
temperature, select
3 SENSOR STATUS from the Main menu. For action, see Section 2.2.1,
“Sensor location”.
8.1.9 Message HIGH TRANSMITTER TEMP
The temperature of the Motherboard of the Indicating transmitter exceeds 60 °C
(140 °F). To read this temperature, select
3 SENSOR STATUS from the Main menu and
check DTR TMP . If the warning persists, the transmitter should be moved to a cooler
place (for example out of sun).
8.1.10 Message LOW TRANSMITTER VOLT
The internal DC voltages of the transmitter are below specifications. Check the
power supply input voltage. If the supply voltage is within specifications, replace
power supply module, Figure 8.1.
8.1.11 Relays and switches not working
Check configuration, Section 5.3, “Viewing system information”, and for possible
correction Section 6.4, “Configuring input switches”, Section 6.3 “Configuring re-
lays”, and Section 6.7 “Configuring prism wash”.
Relay status is indicated by LEDs D23, D25 on the Motherboard, see Section 8.1.2
“Diagnostic LEDs”. For switches, check also LED D26 on the Motherboard indicat-
ing that the 3 V DC supply is correct, see Section 8.1.2 “Diagnostic LEDs”.
The wash function can be tested according to Section 5.1.3 “Testing prism wash”.
8.1.12 Output signal error during NORMAL OPERATION
If there is no output signal, check wiring (Section 3.3, “Electrical connections”) and
the Diagnostic LED D26 (Section 8.1.2, “Diagnostic LEDs”).
If the mA signal does not correspond to the concentration display, check output
signal configuration, Section 5.3, “Viewing system information”, and for possible
correction Section 6.5.1, “Configuring mA outputs”. A low mA signal can also be
caused by high resistance in the external current loop, see Section 3.3, “Electrical
connections”.
A noisy signal can be damped, Section 6.1, “Configuring output signal damping”.