Panasonic S-160PE1R5B Technical Data & Service Manual page 177

F12 Compressor inlet Suction Temperature Sensor (TS) Trouble
1. Error Detection Method
It is judged an error when open circuit or short circuit.
2. Error Diagnosis
1 Sensor
1-1 Sensor connector is connected to PC board properly.
1-2 Resistance between sockets is infinity or 0 ohm.
2 Outdoor
control
2-1 Replace PC board because of outdoor control PC board failure.
PC board
F31 Outdoor Unit Nonvolatile Memory (EEPROM) Trouble
1. Error Detection Method
It is judged an error based on the criteria listed below.
When power initially turned ON for the first time, nonvolatile memory (EEPROM) is not installed.
•
• Read values after writing onto nonvolatile memory (EEPROM) is inconsistent.
2. Error Diagnosis
1 PC board
1-1 Does EEPROM exist on the control PC board?
Is EEPROM installed properly?
1-2
(Check: Bent IC pin or incorrect installation, etc.)
Incorrect EEPROM
1-3
Replace with correct EEPROM.
5-13
Yes 1-2
No Reconnect and check.
Yes Replace sensor.
No 2-1
Yes 1-2
No Install EEPROM.
Yes 1-3
No Correct
5