Thermo King 098916, Руководство по обслуживанию

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Diagnosis: Troubleshooting, Status Messages, Alarm Codes
169
10* Heater Current Too High
(Check Alarm)
• Occurs during pretrip (PTI) or function test only.
• Heater power consumption is 25 percent above
expected current draw (above approximately 4.4
amps and 5.1 amps, depending on voltage).
• Indicates:
• Incorrect heaters or heater connections
• Defective volt or amp meter on relay board
• Defective heater element
• Enter Manual Function Test and turn heaters
on. Check current draw on each phase.
Current draw should be about 4.4 amps on
each phase at 400V (5.1 amps at 460V).
• Check heater resistance between H1 and H2,
H2 and H3, and H1 and H3. Resistance
should be about 99 ohms on each leg.
11* Heater Current Too Low
(Check Alarm)
• Occurs during pretrip (PTI) or function test only.
• Heater power consumption is 25 percent pretrip
below the expected current draw (below
approximately 3.2 amps and 3.8 amps, depending
on voltage).
• Indicates:
• Defective high evaporator temperature switch
• Defective heater element or heat relay
• Defective wire connection
• Incorrect heaters or heater connections
• Enter Manual Function Test and turn heaters
on. Make sure the heat relay energizes. Check
current draw on each phase. Current draw
should be 4.4 on each phase at 400V (5.1
amps at 460V).
• If heat relay fails to energize, check
evaporator high temperature switch. Switch
should be closed at temperatures below 54 C
(130 F); there should be continuity between
pins 5 and 6 in plug J19.
• Check cable No. 2 between controller and
relay board.
• Check heater resistance between H1 and H2,
H2 and H3, and H1 and H3. Resistance
should be about 99 ohms on each leg.
• Check volt and ampere meter.
*If both alarms 10 and 11 are activated, the alarms are caused by a large difference in measured amps. Enter Manual Function
Test menu and start HEAT. Check the amps measurements. If necessary, check the resistance between H1 and H2, H2 and
H3, and H1 and H3. Resistance should be about 99 ohms on each leg.
12** Evaporator Fan High Speed Current Too High
(Check Alarm)
• Occurs during pretrip (PTI) or function test only.
• When the evaporator fan power consumption is 25
percent above expected current draw (above 2.0 to
3.0 amps, depending on voltage)
• Indicates:
• Defective or stuck evaporator fan motor
• Incorrect motor or motor connections
• Defective volt or amp meter on relay board
• Open evaporator door and make sure all fans
rotate freely.
• Enter Manual Function Test and start
evaporator fans on high speed. Make sure all
fans start on high speed. Check fan motor
volts and amps.
• Check volt and ampere meter.
**If both alarms 12 and 13; or 14 and 15 are activated, the alarms are caused by a large difference in measured amps. Enter
Manual Function Test menu and operate evaporator fans on low and high speed. Check the evaporator fan amps measure-
ment. If necessary, check the resistance in the motors: High speed between EF11 and EF12, EF12 and EF13, and EF11 and
EF13; Low speed between EF1 and EF2, EF2 and EF3, and EF1 and EF3. Resistance readings should be equal: High speed
about 6 Ohms, total of 2 motors; Low speed about 20 Ohms, total of 2 motors.
Alarm Codes, Descriptions and Corrective Actions (Continued)
Code Description Corrective Action