Steffes 8188 - Manual (Page 33)

T HERM E LECT A PPENDIX
„
A.07
HELP MENU
The system contains a Help Menu which may be accessed through the control panel. To access the Help Menu,
press and release the M button until the faceplate displays “HELP”. Scroll through the menu by pressing either
the up or the down arrow button.
Display
Reading
Description
Fxxx Firmware Version Number - Indicates the version of software installed.
O xx Outdoor Temperature - Indicates current outdoor temperature as recognized by the system.
tL:xx Target Level - Indicates the percentage of brick core charge level the system is targeting. During
peak periods the value displays as "tL_".
CL:xx Charge Level - Indicates the percentage of heat storage currently in the brick core.
HE x Heating Elements Active - Indicates the total number of heating elements currently energized.
PC x Power Line Carrier Channel - Indicates the channel on which the system is set to receive PLC
communication signal.
P x Power Line Carrier Net Hit Rate Percentage - Indicates the percentage of "GOOD" communication
packets received by the system from the PLC transmitter system.
PS x Indicates which Specialty Timer the system is currently using. The value displayed will be zero if
the Specialty Timer is not being utilized.
CC_x Charge Mode Operation - Indicates the charge control method being utilized during off-peak periods.
CA_x A-Peak Mode Operation - Indicates the charge control method being utilized during anticipated peak
periods.
C1_x Specialty Timer #1 Charge Mode - Specialty Applications Only.
C2_x Specialty Timer #2 Charge Mode - Specialty Applications Only.
ERROR CODES
The system has an on-board diagnostic system to monitor various operating
conditions. If operating conditions move outside the normal operating range, an
error code is displayed on the faceplate. If there are multiple errors simulta-
neously, only the highest priority error code appears. Once corrected, the next
highest priority code will be displayed on the faceplate as “Er—” (i.e., Er05).
Error Code # Description
01 Currently not utilized.
02 Currently not utilized.
03 Currently not utilized.
04 Discharge air sensor temperature is out of normal operating range. This can indicate an open sensor, a
short in the wiring, or a circuit board which is out of calibration. Take an ohm reading across the
sensor to ensure proper operation, check the wiring, and verify the value in L035. Verify that the
supply air blower is connected to the supply blower wiring harness located in the base of the system.
Compare the sensor reading to the value in L112 to verify proper calibration of the circuit board.
Approximate ohm readings are 70° F = 1,199 ohms; 80° F = 941 ohms; 95° F = 646 ohms.
05 Outdoor sensor (direct wired) temperature reading is out of normal operating range. The sensor circuit
may be open or shorted, the processor control board may be out of calibration, or there may be an
incorrect value in L035. If using power line carrier control, make sure the values in L020 and L035 have
been set appropriately. Otherwise, verify that the outdoor sensor is connected to OS and SC on the
12-position terminal block. Compare the sensor reading to the value in L113 to verify proper calibration
of the circuit board. Approximate ohm readings are 5° F = 7,646 ohms; 50° F = 2,024 ohms; 95° F =
646 ohms.
HAZARDOUS VOLTAGE:
Risk of electric shock,
injury, or death. System
may be connected to more
than one branch circuit.
Disconnect power to all
circuits before servicing.
Equipment must be
serviced by a qualified
technician.
WARNING
Appendix