Trane 4TVH0086FE000AA Service Manual page 96

2.12 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
xL0
xL1
xL2
xL4
xL5
xL7
xL8
xL9
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.
1
Inverter module protection
DC bus low voltage protection
DC bus high voltage protection
MCE error
Zero speed protection
Phase sequence error
Compressor frequency variation greater than 15Hz within one second protection
Actual compressor frequency differs from target frequency by more than 15Hz protection
Content
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