MPC Platinum Installation and Operation Manual
17
HT# 059085-00 F
DISPLAY MESSAGES
The MPC Platinum normal display layout utilizes the second line for message indications. The following is a list of the most
common Message Display Line information:
• BYPASS: 0D 0H 15M The control is switched to Bypass for the amount of time indicated. See "AUTO/BYPASS Switch"
on page 16.
• Cycle On: 1/5 min The MPC Platinum is in the Cycle-ON period for a minute out of a total Cycle-ON of 5 minutes.
See "Troubleshooting" on page 44.
• Cycle Off: 6/60 min The MPC Platinum is in the Cycle-OFF period. Only 6 Cycle-ON minutes out of the Cycle 60
minutes has elapsed. See "Understanding the Cycle Concept" on page 4.
• Est Heat at: 125°F The MPC Platinum is energizing Output relay to establish heat before starting a heating cycle. See
"Understanding the Cycle Concept" on page 4.
• Fast C/D: 68°F The Boost option selected is Vari+ESD. The MPC Platinum turns the output off before the last
Night Schedule setting for the Fast Cool Down until the space average temperature drops below
68°F (Night Space Target). See "Early Shutdown Curves" on page 27.
• Manual Boost 25/30 min The MPC Platinum has started a Manual Boost in a Cycle Operation Mode. 25 minutes have
elapsed of the 30 Manual Boost minutes. See "Boost Mode" on page 26.
• Prove Failure The Prove input terminals are now open. The boiler relays are de-energized. However, the System
relay will remain energized. See "Wiring The Prove" on page 12.
• Sensor Fault Either the Outdoor or the System sensor is reading Short or Open. The Output relay will be
energized or de-energized based on the Sensor Fault setting. See "Sensor Fault" on page 20.
• Shutdown Active The SHUTDOWN input is Shorted. Outputs are not active. See "Wiring the Shutdown" on page 12.
• Space L/O: 71°F In Cycle Operation Mode the MPC Platinum is in Space Lockout (utilizing space sensors) until the
space average drops below 71°F. See "Space Lockout" on page 28.
• Steam Time 12/15 min District Steam is the Operating Mode choice. The control activated the output relay for 12 out of 15
minutes before starting the cycle. See "Operation Mode" on page 20.
• Summer The control is set to Summer. No heat is active. See "Season" on page 23.
• Thermal Lockout: 125°F In Cycle Operation Mode the MPC Platinum is in Thermal Lockout until the System Sensor
Temperature drops below the System Set Point less the Differential. See "Thermal Lockout" on
page 28.
• Vari Boost Active The MPC Platinum has started a Vari Boost in a Cycle Operation Mode. See "Boost Mode" on
page 26.
• Waiting for Prove There is a call for heat and the Prove terminals are open before the boilers start ring. The boiler
relay is de-energize while the System relay is energized. See "Wiring The Prove" on page 12.
The third line is reserved for the Cutoff and any day or night setting messages. The following is a list of the most common third
line Messages:
• Day Ext The control is shifted to the Extended Day schedule for specied amount of time. See "Shift" on
page 33.
• Day Shf The control is shifted to the Day schedule from the Night Schedule. See "Shift" on page 33.
• Night ESD The Night Early-Shutdown is active. See "Early Shutdown Curves" on page 27.
• Night Shf The control has been shifted to the Night schedule from the Day Schedule. See "Shift" on page 33.
• No Call for Heat The outdoor temperature is above the Outdoor Cutoff. See "Day and Night Outdoor Cutoff" on
page 24.
• Sys RunOn: 2/5 min The Output relay has turned off and the System relay has been running for 2 minute and will need
to run for a total of 5 minutes. See "System Run-On" on page 28.
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