Trane TVR Pro CO Series - 2.14 xH4: Inverter module protection; 2.14.1 Digital display output; 2.14.2 Description; 2.14.3 Trigger; recover condition

81
2.14 xH4: Inverter module protection
Digital display output
In the error code, 'x' is a placeholder for the compressor system (compressor and related electrical components), with 1
representing compressor system A and 2 representing compressor system B.
Description
 1H4 indicates compressor A inverter module protection.
 2H4 indicates compressor B inverter module protection.
 All units stop running.
 Error code is only displayed on the unit with the error.
Trigger / recover condition
 Trigger condition: Compressor appears three inverter module protections.
 Recover condition: Inverter module goes back to normal.
 Reset method: Manually restart.
Possible causes
 Inverter module protection.
 DC bus low or high voltage protection.
 MCE error.
 Zero speed protection.
 Phase sequence error.
 Excessive compressor frequency variation.
 Actual compressor frequency differs from target frequency.
Specific error codes for xH4 inverter module protection
If an xH4 error code is displayed, enter menu mode “n31” (refer to Part 5, 2.2.3 “menu mode”) to check the history error
code to check the following specific error code: xL0, xL1, xL2, xL4, xL5, xL7, xL8, xL9.
Table 6-2.1: Specific error codes for error xH4
Specific error code
1
Content
xL0 Inverter module protection
xL1 DC bus low voltage protection
xL2 DC bus high voltage protection
xL4 MCE error
xL5 Zero speed protection
xL7 Phase sequence error
xL8 Compressor frequency variation be equal to or greater than 15Hz within one second protection
xL9 Actual compressor frequency differs from target frequency by be equal to or greater than 15Hz
protection
Notes:
1. 'x' is a placeholder for the compressor system (compressor and related electrical components), with 1 representing compressor system A and
2 representing compressor system B.