Thermo King 098916, Руководство по обслуживанию

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Diagnosis: Troubleshooting, Status Messages, Alarm Codes
164
21 Total Current Too High
(Check Alarm)
• When the unit or component current draw is
25 percent above expected amps for 4
minutes.
• Indicates:
• Digital Control valve malfunction
• Compressor, evaporator fan motor,
condenser fan motor or heater current too
high
• Defective volt or amp meter on relay board
• Power supply voltage too low
• Enter Manual Function Test menu and test
(operate) each component. Check volts and
amps to determine which component has high
amp draw.
• Check power supply volts.
• Check volt and ampere meter.
22 Total Current Too Low
(Check Alarm)
• Compressor Start-up: Unit or component
current draw is 50 percent below expected
amps for 4 minutes.
• Indicates:
• Defective or open fuse CB 7A
• Defective or open high pressure cutout
switch
• Defective evaporator high temperature
protection switch
• Defective or open motor internal high
temperature protection switch
• Unit on water-cooled condensing with no
water flow
• Defective condenser coil sensor or sensor
location
• Check LCD display for High Pressure Cutout
message.
• Enter Manual Function Test menu and test
(operate) each component. Check volts and
amps to determine which component has low
amp draw.
• Check volt and ampere meter.
23 Supply Air Temperature Too High
(Check Alarm)
• During Chill or Frozen Mode: Supply air
temperature is too high compared to return air
temperature under operating conditions.
• Indicates:
• Low refrigerant charge
• Incorrect connection or location of supply or
return air sensor
• Air leakage at supply air sensor cable
• Ice or frost on evaporator coil
• Incorrect evaporator fan operation
• Check discharge and suction pressure gauge
readings and refrigerant charge.
• Check for sensor or evaporator fan alarm codes.
• Open evaporator door. Inspect coil for ice or frost
and initiate manual defrost if necessary. Check
for correct evaporator fan motor rotation and
operation.
• Check supply and return sensor connections
and locations.
Status Messages and Controller Actions (Continued)
Message
No.
Status Message Controller Action