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.
14
Table 10 – Fault Code Actions
Flash
Code
Type
AMBER LED
DESCRIPTION
Reset Time Mode
Possible Causes
Actions
43 Fault Codes
ON, no
flash
Standby
1, pause
Variable Capacity
Normal Operation for
communicating
system
1 (2 sec ON), longer
pause (1 second OFF)
Variable Capacity
(Range Cutback)
Speed Limiting for
communicating
systems
1, pause
2-stage ”Low”
Capacity
Low capacity for
non-communicating
2, pause
2-stage ”High”
Capacity
High capacity for
non-communicating
4, pause
2-stage ”Reduced”
Capacity
Speed Limiting for non-communicating systems
25
System
Malfunction
INVALID MODEL
PLUG/INVERTER SIZE NA
Both
Missing model plug
Install the correct model plug
Wrong Model Plug
Installed
Verify correct model plug installed
Damaged Model Plug
Check model plug for corrosion or breakage;
replace if necessary. Check Model Plug
resistance per the wiring diagram
Model Plug not fully
engaged on board
Align per the silkscreen layout
Incorrect Model Plug
with Inverter Size
Replace plug or inverter with correct size (If model
plug is for 2 Ton but Inverter is 3 Ton, fault code 25
will be shown)
Damaged AOC
control
Replace AOC control
31
Fault
HIGH PRESSURE
SWITCH OPEN
(Stage down for each
occurrence, elevates to
fault code 84 when it
occurs while running on
the lowest stage.
Reduced capacity is
cleared when system
has been continuously
running at any stage for
2 hours with
reduced capacity.)
6 Minutes
(then
reduced
stage
operation)
Both
Refer to fault code 84
32
Local
LOW PRESSURE TRIP
(Elevates to fault code
83 after 3 occurrences)
6 Minutes
Both
Refer to fault code 83
33
Local
LOST INVERTER
COMMUNICATIONS
(Occurs after 2
minutes of no
communications
between AOC and MOC)
(Elevates to fault code
48 after 3 consecutive
failures within 20 minute
or 20 minutes continuous
loss of connection)
NA
Both
Refer to fault code 48
