Trane Chiller Air Conditioner Error Codes

Trane Chiller Air Conditioner Error Codes Chilled water inlet and outlet openings are covered for shipment. Each compressor has a separate compressor motor starter. The RTAC series features Trane’s exclusive Adaptive Control logic, which monitors the control variables that govern the operation of the chiller unit.

Trane Chiller Air Conditioner Error Code Solutions

Series R Air-Cooled Helical Rotary Liquid Chillers – RTAC Plus 140 – 350 Ton (60 Hz) RTAC Plus 140 – 300 Ton (50 Hz)

Hex Code	Diagnostic Name and Source
398	BAS Communication Lost. The BAS was setup as “installed” at the MP and the Comm 3 LLID lost communications with the BAS for 15 contiguous minutes after it had been established. Refer to Section on Setpoint Arbitration to determine how setpoints and operating modes may be effected by the comm loss. The chiller follows the value of the Tracer Default Run Command which can be previously written by Tracer and stored nonvolatilely by the MP (either use local or shutdown).
390	BAS Failed to Establish. The BAS was setup as “installed” and the BAS did not communicate with the MP within 15 minutes after power-up. Refer to Section on Setpoint Arbitration to determine how setpoints and operating modes may be effected. Note: The original requirement for this was 2 minutes, but was implemented at 15 minutes for RTAC
2E6	Check Clock. The real time clock had detected loss of its oscillator at some time in the past. This diagnostic can be effectively cleared only by writing a new value to the chiller’s time clock using the TechView or DynaView’s “set chiller time” functions.
8A	Chilled Water Flow (Entering) The entering evaporator water temp fell below the leaving evaporator water temp. by more than 2°F for 100 °F-sec. For RTAC this diagnostic cannot reliably indicate loss of flow, but can warn of improper flow direction through the evaporator, misbound temperature sensors, or other system problems.
5EF	Comm Loss: Chilled Water Flow Switch. Continual loss of communication between the MP and the Immediate Functional ID has occurred for a 30 second period.
5F2	Comm Loss: Cond Rfgt. Immediate Latch Same as Comm Loss: Chilled Water Flow Switch.
694	Comm Loss: Electronic Expansion Valve, Circuit #1. Same as Comm Loss: Chilled Water Flow Switch Remote.
695	Comm Loss: Electronic Expansion Valve, Circuit #2. Same as Comm Loss: Chilled Water Flow Switch Remote.
5DE	Comm Loss: Emergency Stop. Same as Comm Loss: Chilled Water Flow Switch Remote Stop.
68E	Comm Loss: Evap Oil Return Valve, Cprsr 1A. Same as Comm Loss: Chilled Water Flow Switch Remote.

Hex Code	Diagnostic Name and Source
69E	Comm Loss: Evap Oil Return Valve, Cprsr 1B. Same as Comm Loss: Chilled Water Flow Switch.
68F	Comm Loss: Evap Oil Return Valve, Cprsr 2A. Same as Comm Loss: Chilled Water Flow Switch.
69F	Comm Loss: Evap Oil Return Valve, Cprsr 2B. Same as Comm Loss: Chilled Water Flow Switch.
5E4	Comm Loss: Evaporator Entering Water Temperature. Same as Comm Loss: Chilled Water Flow Switch.
5E3	Comm Loss: Evaporator Leaving Water Temperature. Same as Comm Loss: Chilled Water Flow Switch.
6BB	Comm Loss: Evaporator Rfgt Drain Valve – Ckt 1. Same as Comm Loss: Chilled Water Flow Switch.
6BC	Comm Loss: Evaporator Rfgt Drain Valve – Ckt 2. Same as Comm Loss: Chilled Water Flow Switch.
688	Comm Loss: Evaporator Rfgt Liquid Level, Circuit #1. Same as Comm Loss: Chilled Water Flow Switch.
689	Comm Loss: Evaporator Rfgt Liquid Level, Circuit #2. Same as Comm Loss: Chilled Water Flow Switch.
5F0	Comm Loss: Evaporator Rfgt Pressure, Circuit #1. Continual loss of communication between the MP and he Functional ID has occurred for a 30 second period. Note: This diagnostic is replaced by diagnostic 5FB below with Rev 15.0.

Hex Code	Diagnostic Name and Source
5F1	Comm Loss: Evaporator Rfgt Pressure, Circuit #2. Continual loss of communication between the MP and the Functional ID has occurred for a 30 second period. Note: This diagnostic is replaced by diagnostic 5FD below with Rev 15.0.
5F8	Comm Loss: Evaporator Water Pump Control. Same as Comm Loss: Chilled Water Flow Switch.
5DD	Comm Loss: External Auto/ Stop. Same as Comm Loss: Chilled Water Flow Switch Remote.
5E9	Comm Loss: External Chilled Water Setpoint. Continual loss of communication between the MP and the Functional ID has occurred for a 30 second period. Chiller shall discontinue use of the External Chilled Water Setpoint source and revert to the next higher priority for setpoint arbitration.
5DF	Comm Loss: External Circuit Lockout, Circuit #1. Continual loss of communication between the MP and the Functional ID has occurred for a 30 second period. MP will nonvolatily hold the lockout state (enabled or disabled) that was in effect at the time of comm loss.
5E0	Comm Loss: External Circuit Lockout, Circuit #2. Same as Comm Loss: External Circuit Lockout, Circuit #1.
5EA	Comm Loss: External Current Limit Setpoint. Continual loss of communication between the MP and the Functional ID has occurred for a 30 second period. Chiller shall discontinue use of the External Current limit setpoint and revert to the next higher priority for Current Limit setpoint arbitration.
680	Comm Loss: Fan Control Circuit #1, Stage #1. Same as Comm Loss: Chilled Water Flow Switch.
681	Comm Loss: Fan Control Circuit #1, Stage #2. Same as Comm Loss: Chilled Water Flow Switch.
682	Comm Loss: Fan Control Circuit #1, Stage #3. Same as Comm Loss: Chilled Water Flow Switch.

Hex Code	Diagnostic Name and Source
683	Comm Loss: Fan Control Circuit #1, Stage #4. Same as Comm Loss: Chilled Water Flow Switch.
684	Comm Loss: Fan Control Circuit #2, Stage #1. Same as Comm Loss: Chilled Water Flow Switch.
685	Comm Loss: Fan Control Circuit #2, Stage #2. Same as Comm Loss: Chilled Water Flow Switch.
686	Comm Loss: Fan Control Circuit #2, Stage #3. Same as Comm Loss: Chilled Water Flow Switch.
687	Comm Loss: Fan Control Circuit #2, Stage #4. Same as Comm Loss: Chilled Water Flow Switch.
68C	Comm Loss: Fan Inverter Fault, Circuit #1 or Circuit #1, Drive 1. Continual loss of communication between the MP and the Functional ID has occurred for a 30 second period. Operate the remaining fans as fixed speed fan deck.
68D	Comm Loss: Fan Inverter Fault, Circuit #1, Drive 2. Same as Comm Loss: Fan Inverter Fault, Circuit #1 or Circuit #1, .Drive 1.
69A	Comm Loss: Fan Inverter Fault, Circuit #2 or Circuit #2. Same as Comm Loss: Fan Inverter Fault, Circuit #1 or Circuit #1, .Drive 1.
69B	Comm Loss: Fan Inverter Fault, Circuit #2, Drive 2. Same as Comm Loss: Fan Inverter Fault, Circuit #1 or Circuit #1, .Drive 1.
68A	Comm Loss: Fan Inverter Power, Circuit #1 or Circuit #1 Drive 1 and 2. Same as Comm Loss: Fan Inverter Fault, Circuit #1 or Circuit #1, .Drive 1.

Hex Code	Diagnostic Name and Source
698	Comm Loss: Fan Inverter Power, Circuit #2 or Circuit #2 or Drive 1 and 2. Same as Comm Loss: Fan Inverter Fault, Circuit #1 Drive 1.
68B	Comm Loss: Fan Inverter Speed Command, Circuit #1 or Circuit #1 Drive 1 and 2. Same as Comm Loss: Fan Inverter Fault, Circuit #1 or Circuit #1, .Drive 1.
699	Comm Loss: Fan Inverter or Circuit #2 Drive 1 and 2 Speed Command, Circuit #2. Same as Comm Loss: Fan Inverter Fault, Circuit #1 or Circuit #1,.Drive 1.
5D9	Comm Loss: Female Step Load Compressor 1A. Same as Comm Loss: Chilled Water Flow Switch.
5DA	Comm Loss: Female Step Load Compressor 1B.
5DB	Comm Loss: Female Step Load Compressor 2A
5DC	Comm Loss: Female Step Load Compressor 2B
5EB	Comm Loss: High Pressure Cutout Switch, Cprsr 1A
5EC	Comm Loss: High Pressure Cutout Switch, Cprsr 1B
5ED	Comm Loss: High Pressure Cutout Switch, Cprsr 2A

Hex Code	Diagnostic Name and Source
5EE	Comm Loss: High Pressure Cutout Switch, Cprsr 2B
5E1	Comm Loss: Ice-Machine Control
5FA	Comm Loss: Ice-Making Status
5F4	Comm Loss: Intermediate Oil Pressure, Cprsr 1A
5F5	Comm Loss: Intermediate Oil Pressure, Cprsr 1B
5F6	Comm Loss: Intermediate Oil Pressure, Cprsr 2A
5F7	Comm Loss: Intermediate Oil Pressure, Cprsr 2B
69D	Comm Loss: Local BAS Interface
5D2	Comm Loss: Male Port Load Compressor 1A
5D4	Comm Loss: Male Port Load Compressor 1B

Hex Code	Diagnostic Name and Source
5D6	Comm Loss: Male Port Load Compressor 2A
5D8	Comm Loss: Male Port Load Compressor 2B
5D1	Comm Loss: Male Port Unload Compressor 1A
5D3	Comm Loss: Male Port Unload Compressor 1B
5D5	Comm Loss: Male Port Unload Compressor 2A
5D7	Comm Loss: Male Port Unload Compressor 2B
5E5	Comm Loss: Oil Temperature, Circuit #1 or Cprsr 1A
5E6	Comm Loss: Oil Temperature, Circuit #2 or Cprsr 2A
696	Comm Loss: Oil Temperature, Cprsr 1B
697	Comm Loss: Oil Temperature, Cprsr 2B

Hex Code	Diagnostic Name and Source
5E2	Comm Loss: Outdoor Air Temperature
690	Comm Loss: Starter 1A
691	Comm Loss: Starter 1B
692	Comm Loss: Starter 2A
693	Comm Loss: Starter 2B
6AC	Comm Loss: Starter Panel High Temperature Limit – Panel 1, Cprsr 1B
6AB	Comm Loss: Starter Panel High Temperature Limit – Panel 1, Cprsr 2A
6AD	Comm Loss: Starter Panel High Temperature Limit – Panel 2, Cprsr 2B
6A0	Comm Loss: Status/ Annunciation Relays
5FB	Comm Loss: Suction Pressure Cprsr 1A

Hex Code	Diagnostic Name and Source
5FC	Comm Loss: Suction Pressure Cprsr 1B
5FD	Comm Loss: Suction Pressure Cprsr 2A
5FE	Comm Loss: Suction Pressure Cprsr 2B
2A1	Condenser Fan Variable Speed Drive Fault – Circuit 1 (Drive 1)
5B4	Condenser Fan Variable Speed Drive Fault – Circuit 1 Drive 2
2A2	Condenser Fan Variable Speed Drive Fault – Circuit 2 (Drive 1)
5B5	Condenser Fan Variable Speed Drive Fault – Circuit 2 (Drive 2)
5B8	Condenser Refrigerant Pressure Transducer – Circuit 1
5B9	Condenser Refrigerant Pressure Transducer – Circuit 2
FD	Emergency Stop

Hex Code	Diagnostic Name and Source
8E	Evaporator Entering Water Temperature Sensor
AB	Evaporator Leaving Water Temperature Sensor
27D	Evaporator Liquid Level Sensor – Circuit 1
3F9	Evaporator Liquid Level Sensor – Circuit 2
6B9	Evaporator Rfgt Drain – Circuit 1
6BA	Evaporator Rfgt Drain – Circuit 2
ED	EvaporatorWater Flow Lost
384	Evaporator Water Flow Overdue
5C4	Excessive Loss of Comm
87	External Chilled Water Setpoint

Hex Code	Diagnostic Name and Source
89	External Current Limit Setpoint
1C6	High Differential Refrigerant Pressure – Circuit 1
1C7	High Differential Refrigerant Pressure – Circuit 2
584	High Evaporator Liquid Level – Circuit 1
5B7	High Evaporator Liquid Level – Circuit 2
6B8	High Evaporator Refrigerant Pressure
1DE	High Oil Temperature – Compressor 1A
1E0	High Oil Temperature – Compressor 1B
1DD	High Oil Temperature – Compressor 2A
1DF	High Oil Temperature – Compressor 2B

Hex Code	Diagnostic Name and Source
F5	High Pressure Cutout – Compressor 1A
F6	High Pressure Cutout – Compressor 1B
BE	High Pressure Cutout – Compressor 2A
BF	High Pressure Cutout – Compressor 2B
5BE	Intermediate Oil Pressure Compressor 2A
BF	High Pressure Cutout – Compressor 2B
5BE	Intermediate Oil Pressure Transducer – Compressor 1A
5BF	Intermediate Oil Pressure Transducer – Compressor 1B
5C0	Intermediate Oil Pressure Transducer – Compressor 2A
5C1	Intermediate Oil Pressure Transducer – Compressor 2B

Hex Code	Diagnostic Name and Source
C5	Low Chilled Water Temp: Unit Off
C6	Low Chilled Water Temp: Unit On
1AE	Low Differential Refrigerant Pressure – Circuit 1
1AF	Low Differential Refrigerant Pressure – Circuit 2
583	Low Evaporator Liquid Level – Circuit 1
5B6	Low Evaporator Liquid Level – Circuit 2
194	Low Evaporator Refrigerant Temperature – Circuit 1
195	Low Evaporator Refrigerant Temperature – Circuit 2
6B3	Low Evaporator Temp – Ckt 1: Unit Off
6B3	Low Evaporator Temp – Ckt 2: Unit Off

Hex Code	Diagnostic Name and Source
198	Low Oil Flow – Compressor 1A
199	Low Oil Flow – Compressor 1B
19A	Low Oil Flow – Compressor 2A
19B	Low Oil Flow – Compressor
B5	Low Suction Refrigerant Pressure – Circuit 1
B6	Low Suction Refrigerant Pressure – Circuit 2
B7	Low Suction Refrigerant Pressure – Cprsr 1B
B8	Low Suction Refrigerant Pressure – Cprsr 2B
BA	Motor Current Overload – Compressor 1A
BB	Motor Current Overload – Compressor 1B

Hex Code	Diagnostic Name and Source
BC	Motor Current Overload – Compressor 2A
BD	Motor Current Overload – Compressor 2B
1AD	MP Application Memory CRC Error
6A1	MP: Could not Store Starts and Hours
5FF	MP: Invalid Configuration
6A2	MP: Non-Volatile Block Test Error
69C	MP: Non-Volatile Memory Reformat
D9	MP: Reset Has Occurred
1E1	Oil Flow Fault – Compressor 1A
1E2	Oil Flow Fault – Compressor 1B

Hex Code	Diagnostic Name and Source
5A0	Oil Flow Fault – Compressor 2A
5A1	Oil Flow Fault – Compressor 2B
1E6	Oil Temperature Sensor – Cprsr 1B
1E8	Oil Temperature Sensor – Cprsr 2B
1E6	Oil Temperature Sensor – Cprsr 1A
1E8	Oil Temperature Sensor – Cprsr 2B
1E6	Oil Temperature Sensor – Cprsr 1A
1E7	Oil Temperature Sensor – Cprsr 2A
A1	Outdoor Air Temperature Sensor
D7	Over Voltage

Hex Code	Diagnostic Name and Source
19C	Phase Loss – Compressor 1A
19D	Phase Loss – Compressor 1B
19E	Phase Loss – Compressor 2A
19F	Phase Loss – Compressor 2B
184	Phase Reversal – Compressor 1A
185	Phase Reversal – Compressor 1B
186	Phase Reversal – Compressor 2A
187	Phase Reversal – Compressor 2B
1A0	Power Loss – Compressor 1A
1A1	Power Loss – Compressor 1B

Hex Code	Diagnostic Name and Source
1A2	Power Loss – Compressor 2A
1A3	Power Loss – Compressor 2B
8C	Pumpdown Terminated – Circuit 1
8D	Pumpdown Terminated – Circuit 2
1B2	Severe Current Imbalance – Compressor 1A
1B3	Severe Current Imbalance – Compressor 1B
1B4	Severe Current Imbalance – Compressor 2A
1B5	Severe Current Imbalance – Compressor 2B
5CD	Starter 1A Comm Loss: MP
6A7	Starter 1A Dry Run Test

Hex Code	Diagnostic Name and Source
5CE	Starter 1B Comm Loss: MP
6A8	Starter 1B Dry Run Test
5CF	Starter 2A Comm Loss: MP
6A9	Starter 2A Dry Run Test
5D0	Starter 2B Comm Loss: MP
6AA	Starter 2B Dry Run Test
CC	Starter Contactor Interrupt Failure – Compressor 2A
CA	Starter Contactor Interrupt Failure – Compressor 1A
CB	Starter Contactor Interrupt Failure – Compressor 1B
CD	Starter Contactor Interrupt Failure – Compressor 2B

Hex Code	Diagnostic Name and Source
180	Starter Did Not Transition – Compressor 1A
181	Starter Did Not Transition – Compressor 1B
182	Starter Did Not Transition – Compressor 2A
183	Starter Did Not Transition – Compressor 2B
6A3	Starter Failed to Arm/Start – Cprsr 1A
6A4	Starter Failed to Arm/Start – Cprsr 1B
6A5	Starter Failed to Arm/Start – Cprsr 2A
6A6	Starter Failed to Arm/Start – Cprsr 2B
1E9	Starter Fault Type I – Compressor 1A
1 EA	Starter Fault Type I – Compressor 1B

Hex Code	Diagnostic Name and Source
1 EB	Starter Fault Type I – Compressor 2A
1EC	Starter Fault Type I – Compressor 2B
1ED	Starter Fault Type II – Compressor 1A
1EE	Starter Fault Type II – Compressor 1B
1EF	Starter Fault Type II – Compressor 2A
1F0	Starter Fault Type II – Compressor 2B
1F1	Starter Fault Type III – Compressor 1A
1F2	Starter Fault Type III – Compressor 1B
1F3	Starter Fault Type III – Compressor 2A
1F4	Starter Fault Type III – Compressor 2B

Hex Code	Diagnostic Name and Source
5C7	Starter Module Memory Error Type 1 – Starter 2A
5C8	Starter Module Memory Error Type 1 – Starter 2B
5C5	Starter Module Memory Error Type 1Starter 1A
5C6	Starter Module Memory Error Type 1-Starter 1B
5C9	Starter Module Memory Error Type 2 – Starter 1A
5CA	Starter Module Memory Error Type 2 – Starter 1B
5CB	Starter Module Memory Error Type 2 – Starter 2A
5CC	Starter Module Memory Error Type 2 – Starter 2B
6B1	Starter Panel High Temperature Limit – Panel 1, Cprsr 1B
6B0	Starter Panel High Temperature Limit – Panel 1, Cprsr 2A

Hex Code	Diagnostic Name and Source
6B2	Starter Panel High Temperature Limit – Panel 2, Cprsr 2B
5BA	Suction Refrigerant Pressure Transducer – Circuit 1, Compressor 1A
5BB	Suction Refrigerant Pressure Transducer – Circuit 1, Compressor 1B
5BC	Suction Refrigerant Pressure Transducer – Circuit 2, Compressor 2A
5BD	Suction Refrigerant Pressure Transducer – Circuit 2, Compressor 2B
5B0	Transition Complete Input Opened – Compressor 1A
5B1	Transition Complete Input Opened – Compressor 1B
5B2	Transition Complete Input Opened – Compressor 2A
5B3	Transition Complete Input Opened – Compressor 2B
5AC	Transition Complete Input Shorted – Compressor 1A

Hex Code	Diagnostic Name and Source
5AD	Transition Complete Input Shorted – Compressor 1B
5AE	Transition Complete Input Shorted – Compressor 2A
5AF	Transition Complete Input Shorted – Compressor 2B
D8	Under Voltage
771	Very Low Evaporator Refrigerant Pressure – Circuit 1
772	Very Low Evaporator Refrigerant Pressure – Circuit 2

Trane Chiller Air Conditioner Error Code Solutions

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