Thermo King 098916, Руководство по обслуживанию

Страница: 180 / 196

Diagnosis: Troubleshooting, Status Messages, Alarm Codes
179
97 Compressor Sensor Open Circuit
(Check Alarm)
• When the sensor circuit resistance is higher than
10,000,000 ohms.
• Temperature is below -30 C (-22 F).
• Indicates:
• Open circuit to sensor
• Defective or wrong sensor
• Defective relay board
• Defective cable No. 1
• Defective controller
• Check sensor resistance between pins 9 and
10 on plug J15. Resistance must be 100,000
ohms at 25 C (77 F).
• Check cable No. 1 between controller and
relay board.
NOTE: Unit will operate normally without
compressor sensor. However, controller
compressor high temperature protection is
not active.
98 Compressor Sensor Short Circuit
(Check Alarm)
• Sensor circuit resistance lower than 200 ohms.
• Temperature above 180 C (356 F).
• Indicates:
• Short circuit to sensor
• Defective or wrong sensor
• Defective relay board
• Defective cable No. 1
• Defective controller
• Check sensor resistance between pins 9 and
10 on plug J15. Resistance must be 100,000
ohms at 25 C (77 F).
• Check cable No. 1 between controller and
relay board.
115 Probe Error
(Check Alarm)
• Occurs during pretrip (PTI) test or probe test failed
in Chilled mode.
• Temperature difference between return air and
evaporator coil sensors is too high (1.5 C [2.7 F]
difference maximum)
• Check sensor connections. Check sensor
resistance of each sensor. Resistance must be
2,000 ohms at 25 C (77 F).
116 Probe Error
(Check Alarm)
• Occurs during pretrip (PTI) test or probe test failed
in Chilled mode.
• Temperature difference between return air and
supply air sensors is too high (0.8 C [1.5 F]
difference maximum)
• Check sensor connections. Check sensor
resistance of each sensor. Resistance must be
2,000 ohms at 25 C (77 F).
117 Probe Error
(Check Alarm)
• Occurs during pretrip (PTI) test or probe test failed
in Chilled mode.
• Temperature difference between LH supply and RH
supply sensors is too high (0.5 C [1.0 F] difference
maximum)
• Check sensor connections. Check sensor
resistance of each sensor. Resistance must be
2,000 ohms at 25 C (77 F).
• Check left hand and right hand supply air
sensor locations.
119 Digital Control Valve Error
• Current consumption not correct for valve position
• Check Digital Valve function
Alarm Codes, Descriptions and Corrective Actions (Continued)
Code Description Corrective Action