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Diagnosis: Troubleshooting, Status Messages, Alarm Codes
173
22
Capacity Test 1 Error
(Check Alarm)
• Occurs during pretrip (PTI) test only.
• Difference between supply and return air
temperature is too small with high speed
evaporator fans (less than approximately 4.5 C [8
F]).
• When the return air temperature does not reach
-18 C (0 F) within preset time.
• Indicates:
• Incorrect location of supply or return air sensor
• Air leakage at supply sensor cable
• Defective supply or return air sensor
• Interchanged sensor connections
• Incorrect evaporator fan rotation or high speed
operation
• Incorrect refrigeration system operation
• Container/side panels defective, damaged or
leaking
• Economizer circuit defective
• Enter Manual Function Test and start
evaporator fans on high speed. Then select
Sensor Checks test and operate fans 2 to 5
minutes. Check supply, return and evaporator
coil (defrost) sensor temperatures. Sensor
readings should be the same (evaporator coil
may be 0.5 C [1.0 F] lower due to fan motor
heat).
NOTE: This sensor check does not detect
air leakage around the sensor cables.
• Open evaporator door and inspect evaporator
fan rotation. Make sure fans are rotating
correctly on low speed.
• Check the sensor connections.
• Enter Manual Function Test menu. Start and
check current draw of the following
components separately and together:
compressor, vapor on, condenser fan and
evaporator fans (high). Check discharge and
suction pressure readings. Also check the
refrigerant charge.
NOTE: This alarm can be activated in
ambient temperatures below -10 C (14 F),
even under normal conditions.
25
Evaporator Temperature Test Error
(Check Alarm)
• Occurs during pretrip (PTI) test only.
• Evaporator coil temperature is too high with no
evaporator fans running (above about -15 C [+5 F]).
• Indicates:
• Evaporator coil sensor is not in contact with
evaporator coil
• Return and evaporator coil sensor connections
are interchanged
• Expansion valve does not open enough or opens
too much
• Check evaporator coil sensor location.
• Check evaporator coil sensor and return air
sensor connections.
• Check expansion valve superheat setting.
26
Vapor Injection Valve Error
• Occurs during function test only
• Current consumption not correct for valve
position
• Check vapor valve function
Alarm Codes, Descriptions and Corrective Actions (Continued)
Code
Description
Corrective Action
Summary of Contents for 098916
Page 5: ......
Page 11: ...Table of Contents 10...
Page 19: ...Service Guide 18...
Page 28: ...Specifications 27 Figure 2 Physical Specifications AMA313...
Page 41: ...Unit Description Features Options 40...
Page 105: ...Operating Instructions 104...
Page 155: ...Servicing The Unit 154...
Page 187: ...Index 186...
Page 189: ...Wiring and Schematic Diagrams Index 188...
Page 190: ...189 Wiring Schematic...
Page 191: ...190 Wiring Diagram Page 1 of 2...
Page 192: ...191 Wiring Diagram Page 2 of 2...