Thermo King CRR-40 119, Manual

Page: 119 / 170

MP-3000a Controller
119
Code Description Corrective Action
111 KVQ Heat Error (Check Alarm)
• KVQ valve actuation temperature is not in range
within preset time.
• Indicates:
• Disconnected CB7A
• Defective heat element in valve actuator
• Inaccurate actuator temperature
measurement
• Defective relay board
• Defective circuit between pin 4 and 6 on plug
J11 (KVQ actuator requires power from both
relays 2 and 3)
• Defective cable No. 2
• Defective controller
• Carefully inspect actuator:
If actuator is hot, check that the actuator sensor
has been mounted correctly in p ins 11 and 12
on plug J15.
If actuator is not hot, check resistance between
pins 5 and 6 on plug J11. Resistance must be
about 17 Ohms. Check voltage from pins 5 and 6
(relays 2 and 3).
• Check cable No. 2 between controller and relay
board.
112 Zero Current Too High (Check Alarm)
• Ground (zero current) circuit 30 milliamps.
• Indicates:
• Defective motor or heater insulation to ground
• Enter Manual Function Test manual and test
(operate) each motor and heater separately. not
when alarm occurs.
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).
• Check left hand and right hand supply air sensor
locations.
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]
• 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.
117 Probe Error (Check Alarm)
• Occurs during Pretrip (PTI) test or Probe Test
failed in CHilled mode
• Temperature difference between LH supply and
RD supply sensors is too high (0.5 C [1.0 F]
difference maximum)
• Indicates:
• Incorrect temperature reading on one sensor
• Supply air sensor not placed in air flow stream
• 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.