09/03
2-204
DC 3535/2240/1632, WC M24
9-660, 9-661
Initial issue
Status Indicator RAPs
9-660 Environment Sensor Temperature
An incorrect value was detected by the Environment Sensor (Temperature).
Procedure
Disconnect P/J255. There is 1 Ohm or less measured between P255-3 and P255-4 on the
Environment Sensor (Figure 1).
YN
Replace the Environment Sensor (PL 1.3).
Replace the I/F PWB (PL 9.1) and MCU PWB (PL 13.1) in sequence.
Figure 1 9-660 Rap Circuit Diagram - Environment Sensor
9-661 Environment Sensor Humidity
An incorrect value was detected by the Environment Sensor (Humidity).
Procedure
There is +0.4VDC to +17VDC from P/J536-B3 on the I/F PWB to GND (Figure 1).
YN
There is +5VDC from P/J536-B4 on the I/F PWB to GND.
YN
Go to Figure 1. Check the wires and connectors. If the check is OK, replace the
MCU PWB (PL 13.1).
Go to Figure 1. Check for an open circuit and poor contact if the check is OK replace the
Environment Sensor (PL 1.3).
Replace the I/F PWB (PL 9.1). If the problem continues, replace the MCU PWB (PL 13.1).
Figure 1 9-661 Rap Circuit Diagram - Environment Sensor
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