CVH8, HVH8, TVH8, VA9, HVA9, TVA9: APPLICATION GUIDELINE & SERVICE MANUAL
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
23
96
System
Malfunction
VDC UNDER
VOLTAGE LOCKOUT
(Elevated from fault code
92 after 5 occurrences)
2 Hours
Both
Low supply line
voltage (< 197 VAC)
Check supply voltage to ODU; if low contact utility
provider
Inverter internal
damage
Replace Inverter
97
System
Malfunction
VDC OVER VOLTAGE
LOCKOUT
(Elevated from fault
2 Hours
Both
High supply line
voltage (> 253 VAC)
Check supply voltage to ODU; if high contact utility
provider
code 91 after 5
occurrences)
Inverter internal
damage
Replace Inverter
98
Event
HIGH TORQUE EVENT
(Event will cause stage
down and when stage is
at lowest level, will
elevate to fault code 99)
NA
Both
Compressor is
operating outside the
allowed operational
envelope
Inverter will reduce speed to a lower stage
Both
Refer to fault code 99
99
System
Malfunction
HIGH TORQUE
LOCKOUT
(Elevated from fault
code 98 when 98
occurs at lowest stage)
2 hours
Cool
Overcharged System
Check system subcooling to determine charge
status, if high remove charge using Charging Mode
(follow proper charging procedures)
Heat
Overcharged System
Check charge in heating mode per heating check
charge chart. If pressures do not match then pull
out charge, weigh in using heating charge method
Both
Mis-wire
Check mis-wire of compressor leads at
terminals U,V,W
Both
Outdoor Airflow too low
or off
Check ODU coil for clogging (ice or debris) and
clean if necessary; Troubleshoot ODU fan motor
and make sure it is working
Both
Expansion Device
Restriction
Troubleshoot TXV
Troubleshoot EXV
Heat
Overcharged System
Check charge in heating mode per heating check
charge chart. If pressures do not match then pull
out charge, weigh in using heating charge method
Table 10 – Fault Code Actions (Continued)
Flash
Code
Type
AMBER LED
DESCRIPTION
Reset Time Mode
Possible Causes
Actions
