Mitsubishi HMA100V Technical Manual

-
150
-
Service
'10 • HM-T-149
Hot water alarm
The following alarms block hot water production via outdoor unit. The additional heat source is blocked completely.
Description
8
9
34
35
Alarm text on the
display
Alarm
no.
May be due to
High HW temp.
High AH temp.
S. fault HW
S. fault AH
Too high temperature (>90°C) on hot water sensor
(BT6).
- Contactor to internal electric heater defective
- Incorrect external heat source setting
Also see the troubleshooting guide on page 156
- Contactor to internal electric heater defective
- Incorrect external heat source setting
Also see the troubleshooting guide on page 156.
- Sensor does not work (see “Temperature sensor”
section)
Also see the troubleshooting guide on page 160.
- Open-circuit or short-circuit on sensor input
- Sensor does not work (see “Temperature sensor”
section)
Also see the troubleshooting guide on page 160.
- Open-circuit or short-circuit on sensor input
Too high temperature (>90°C) on immersion heater
sensor (BT19).
Sensor fault, hot water (BT6).
Sensor fault, immersion heater (BT19).
Supply alarm
The following alarms switch off heating/cooling. Only hot water production is permitted.
10
11
30
36
Description
Alarm text on the
display
Alarm
no.
May be due to
High VBF1
High VBF2
Sensor fault UG
Sensor fault VBF1
Too high temperature (>90°C) on flow line sensor,
system 2.
Too high temperature (>90°C) on flow line sensor,
system 1 (BT2).
Sensor fault, outdoor temperature (BT1).
Sensor fault, supply, system1 (BT2).
- Sensor does not work (see “Temperature sensor”
section)
Also see the troubleshooting guide on page 160.
- Sensor does not work (see “Temperature sensor”
section)
Also see the troubleshooting guide on page 157.
- Sensor does not work (see “Temperature sensor”
section)
Also see the troubleshooting guide on page 157.
- Open-circuit or short-circuit on sensor input
- Sensor does not work (see “Temperature sensor”
section)
Also see the troubleshooting guide on page 160.
- Open-circuit or short-circuit on sensor input
37 Sensor fault VBF2 Sensor fault, supply, system 2.
- Sensor does not work (see “Temperature sensor”
section)
Also see the troubleshooting guide on page 160.
- Open-circuit or short-circuit on sensor input
Alarm list

Mitsubishi HMA100V Specifications

General

Brand	Mitsubishi
Model	HMA100V
Category	Heat Pump
Language	English