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48 Packaged Heat Pump • WC-IOM-7
Troubleshooting
to check all of the RTRM outputs, and all of the external controls (relays,
contactors, etc.) that the RTRM outputs energize, for each respective mode.
Proceed to Step 6.
6. Step the system through all of the available modes, and verify operation of
all outputs, controls, and modes. If a problem in operation is noted in any
mode, you may leave the system in that mode for up to one hour while
troubleshooting. Refer to the sequence of operations for each mode, to assist
in verifying proper operation. Make the necessary repairs and proceed to
Steps 7 and 8.
7. If no abnormal operating conditions appear in the test mode, exit the test
mode by turning the power “Off” at the main power disconnect switch.
8. Refer to the individual component test procedures if other microelectronic
components are suspect.
System Status Checkout Procedure
“System Status” is checked by using one of the following two methods:
Method 1
If the Zone Sensor Module (ZSM) is equipped with a remote panel with LED
status indication, you can check the unit within the space. If the ZSM does not
have LED’s, use Method 2. BAYSENS010B, BAYSENS011B, BAYSENS019B,
BAYSENS020B, BAYSENS021A & BAYSENS023A all have the remote panel
indication feature. The LED descriptions are listed below.
LED 1 (System)
“On” during normal operation.
“Off” if a system failure occurs or the LED fails.
“Flashing” indicates test mode.
LED 2 (Heat)
“On” when the heat cycle is operating.
“Off” when the heat cycle terminates or the LED fails.
“Flashing” indicates a heating failure.
LED 3 (Cool)
“On” when the cooling cycle is operating.
“Off” when the cooling cycle terminates or the LED fails.
“Flashing” indicates a cooling failure.