Hvac Override Usage Meter; Diagnostics; Error Code Display; System Errors (Se) - Carrier 33CS Installation, Service, And Troubleshooting Instructions

To configure the Override Usage Meter option, set cat-
egory 7, option 7. Use the left set point buttons to configure
the option ON or OFF. The default is OFF.
To disable the Override Usage Meter, set the option to
OFF. No metering occurs.
HVAC Override Usage Meter —
Override Usage Meter option is set to ON, the meter will
record the minutes the zone demand matches the system mode
in unoccupied override mode. When the HVAC Override Us-
age Meter option is set to OFF, zone metering for this mode
will not occur. The HVAC override usage meter can accu-
mulate up to 32,767 minutes (about 22 days) of HVAC over-
ride usage.
To configure the HVAC Override Usage Meter option, set
category 7, option 8. Use the left set point buttons to con-
figure the option ON or OFF. The default is OFF.
To disable the HVAC Override Usage Meter, set the op-
tion to OFF. No metering occurs.

DIAGNOSTICS

The TEMP system thermostat has diagnostic capabilities
for components, and zone and system information.
Diagnostic problems, called errors or alarms, are divided
into 3 categories: Hardware Failure (HF) errors, Storage Fail-
ure (SF) errors, and System Errors (SE). The TEMP system
Thermostat tracks the operating conditions in the zone.
Error Code Display —
TEMP system SE, SF, and HF diagnostic functions can be
displayed to indicate which error has been declared. The 2
letters located in the bottom of the display represent the type
of error. The 3 numbers located in the top of the display iden-
tify the specific error.
When the Error Code Display option is ON, an error code
will be displayed when the associated error occurs. Any pre-
vious error codes that occurred when the Error Code Dis-
play was configured OFF will be displayed.
When an error is cleared, any errors remaining in the ther-
mostat will be displayed sequentially until all errors are cleared.
When the Error Code Display option is set to OFF, no
error codes will be displayed by the TEMP system
thermostat.
→
To configure the Error Code Display option, set cate-
gory 7, option 1. Use the left set point buttons to toggle the
setting to ON or OFF. The default is OFF.
System Errors (SE) —
Table 3.
Table 3 — System Errors
ERROR
SYSTEM ERROR DESCRIPTION
CODE
SE01 Comfort Trend (Space Temperature)
SE02 HVAC Usage Meter Full
SE03 Override Usage Meter Full
SE04 HVAC Override Usage Meter Full
SE06 Cannot Detect Indoor Fan ON
SE07 Heat Mode Error
SE08 Cool Mode Error
SE09 Dirty Filter Error
SE10 IAQ Error
SE11 High/Low Temperature Limit Exceeded
SE12 Cannot Detect Indoor Fan OFF
SE13 Stuck Gas Valve
When the HVAC
An error code representing the
System Errors are shown in
ALARM
PRIORITY
LEVEL
2
4
4
4
2
2
2
4
2
2
2
1
COMFORT TREND ERROR (SPACE TEMPERATURE
ALARM) (SE01) — A Comfort Trend error is a system er-
ror that provides information on the ability of the system to
maintain temperature conditions in its reference zone.
When the reference zone demand exceeds the Comfort Trend
Demand Set Point, the TEMP system thermostat begins track-
ing the Temperature Trend of the zone.
The TEMP system thermostat declares a Comfort Trend
Error for the zone when the Temperature Trend is continu-
ously zero (zone temperature conditions are not improving)
or positive (zone temperature conditions are becoming worse)
for the entire Comfort Trend Time Limit.
To clear a Comfort Trend Error, use the Unit Reset func-
tion. The Unit Reset function is in category 7, option 11. The
default is OFF. Use the left set point buttons to set the option
to ON. The TEMP system thermostat will reset all errors.
By indicating when zone heating or cooling set points can-
not be satisfied, a Comfort Trend Error helps identify zone
problems.
When the system is commissioned, this information can
be used by the installing contractor to recognize zone air-
flow or supply-air temperature problems in the system.
During system operation, Comfort Trend Errors can be con-
tinuously monitored for the servicing contractor by a local
network access device to determine when system or equip-
ment problems are affecting zone comfort.
To troubleshoot a Comfort Trend Error:
1. Check the quantity of airflow into the TEMP system ther-
mostat zone.
a. Check the ductwork running to the TEMP system ther-
mostat zone. Loose connections or poorly insulated duct
can result in reduced air volume or temperatures caus-
ing the TEMP system thermostat zone not to satisfy
within the Comfort Trend Time Limit.
b. After the previous steps have been completed, the per-
formance of the supply air fan should be checked. Dur-
ing full load situations, the fan must produce an ad-
equate quantity of supply air at the necessary static
pressure to meet the zone design requirements. Reset
the TEMP system thermostat transparent error
register.
2. Check the temperature of airflow into the zone. If the tem-
perature is above the zone design conditions during sys-
tem cooling mode, or below design conditions during system
heating mode, the operation of the equipment should be
checked. Reset the TEMP system thermostat transparent
error register.
Comfort Trend Demand Set Point — The Comfort Trend
Demand Set point establishes the minimum zone demand
level that must exist in the reference zone before it can de-
clare a Comfort Trend Error.
The Comfort Trend Demand set point is configured in cat-
egory 7, option 4. Use the left set point buttons to raise or
lower the set point. The range of values is 0 to 25.5° F in
⁄ ° F increments. The default is 0° F.
1
10
Comfort Trend Time Limit — The Comfort Trend Time Limit
establishes the continuous amount of time that must elapse
before the TEMP system thermostat can declare a Comfort
Trend Error.
The Comfort Trend Time Limit set point is configured from
category 7, option 5. The range of values is 0 to 255 minutes
in 1-minute increments. The default is 0 minutes.
METER FULL ERROR (SE02,03,04) — System Errors SE02,
SE03, and SE04 indicate when a zone meter is full.
NOTE: During a meter full error, the full usage meter stops
recording and retains its maximum value until cleared.
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