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Service Manual -
HRG18xxS1P
508206-01
Issue 2140
Page 43 of 83
Description
Example of Display
Idle Mode
: Decimal point flashes at 1 Hz.
Idle Mode
: Decimal point flashes at 1 Hz (0.5 second on, 0.5 second off).
Display OFF.
Soft Disable Mode
: Top and bottom horizontal line and decimal point
flash at 1 Hz.
If indoor or outdoor control displays Soft Disable code:
1) Confirm proper wiring between all devices (thermostat, indoor and
outdoor).
2) Cycle power to the control that is displaying the Soft Disable code.
3) Put the room thermostat through Setup.
4) Go to Setup/System Devices/Thermostat/Edit/push Reset.
5) Go to Setup/System Devices/Thermostat/Edit/push Reset All.
If the room thermostat detects a new device or a device that is not
communicating, it sends a Soft Disable. When this occurs, Alarm 10 is
activated and the room thermostat sends a Soft Disable command to the
offending device on the bus (outdoor control, IFC, AHC, EIM or Damper
Control Module).
Soft Disable Mode
: Top and bottom horizontal line and decimal point
flash at 1 Hz (0.5 second on, 0.5 second off).
The control in Soft Disable Mode is indicated by the following:
• On AHC, IFC and outdoor controls, Soft Disable Mode is indicated by
flashing double horizontal lines on the 7-segment display.
• On the Damper Control Module and EIM, the green LED will blink 3
seconds on and 1 second off.
O.E.M. Test Mode
All segments flashing at 2 Hz (unless error is detected). NOTE - Control
should be replaced.
Anti-Short-Cycle Delay
The middle line flashes at 1 Hz for 2 seconds, followed by a 2-second
display of the number of minutes left on the timer (value is rounded up: 2
min. 1 sec. is displayed as 3). If activated, the anti-short cycle delay time
remaining is displayed (default is 300 sec./5 min.).
Cooling Capacity
: Shows cooling stage C1 or C2 operating if non-
communicating.
Cooling compressor capacity (1second on, 0.5 second off) followed by
ambient temperature.
Non-Communicating thermostat with second stage cooling active and
ambient of 95F : C 2 pause A 9 5 repeat.
C 5 0
pause
A 7 6
Diagnostic recal
l: Shows the last 10 stored diagnostic error codes.
If first error is
E 2 5 0
, second
E 2 3 1
pause
E 2 5 0
pause
E 2 3 1
Next codes (up to 10) are shown using same method.
Fault memory clears
If there are no error codes stored:
E
pause
0 0 0
.
After the fault memory is cleared, the following string flashes every 0.5
seconds:
0 0 0 0
pause
Active error in outdoor control Idle mode
: Show all active error(s)
codes.
Following display string is repeated if Error E 125 and E 201 are present:
E 1 2 5
pause
E 2 0 1
Active error in run mode
: Show current status and all active error(s)
codes.
Following display string is repeated if Error E 440 is present while cooling
demand is 80 percent:
C 8 0
pause
E 4 4 0
Outdoor Ambient Temperature (OAT)
: Any time OAT is within operating
range, value is displayed if unit is in diagnostic and non-diagnostic
modes.
Following display string is repeated if cooling is active and OAT is 104
°
F:
C 3 5
pause
A 1 0 4
pause
Liquid Line Temperature (LIQ)
: Any time LIQ is sensed in operating
range, value is displayed if unit is in diagnostic mode or manually enabled
for non-diagnostic modes.
Following display string is repeated if cooling is active and LIQ is 105
°
F:
C 3 1
pause
L 1 0 5
pause
Charge Mode
: When unit is in the charge mode, Suction pressure
(SPxxx), Suction Temp (Stxx.x), Superheat (SHxx.x), Liquid pressure
(LPxxx), Liquid Temp (Ltxx.x) and subcooling (SCxx.x) will be scrolled on
the 7-segment display
The following string is repeated:
S P 1 3 5
pause
S t 6 2
pause
S H 1 5
pause
L P 3 4 5
pause
L t 9
6
pause
S C 1 0
Repeat
Table 13. Outdoor Control 7-Segment Unit Status Displays